diff --git a/api/v1/config.pb.go b/api/v1/config.pb.go
index 63ed855..2a14940 100644
--- a/api/v1/config.pb.go
+++ b/api/v1/config.pb.go
@@ -649,6 +649,7 @@ type ConfigSecurity struct {
 	MaxDocumentSize           int32    `protobuf:"varint,9,opt,name=max_document_size,json=maxDocumentSize,proto3" json:"max_document_size,omitempty"`
 	DocumentAllowedExt        []string `protobuf:"bytes,10,rep,name=document_allowed_ext,json=documentAllowedExt,proto3" json:"document_allowed_ext,omitempty"`
 	LoginRequired             bool     `protobuf:"varint,11,opt,name=login_required,json=loginRequired,proto3" json:"login_required,omitempty"`
+	EnableVerifyRegisterEmail bool     `protobuf:"varint,12,opt,name=enable_verify_register_email,json=enableVerifyRegisterEmail,proto3" json:"enable_verify_register_email,omitempty"`
 }
 
 func (m *ConfigSecurity) Reset()         { *m = ConfigSecurity{} }
@@ -761,6 +762,13 @@ func (m *ConfigSecurity) GetLoginRequired() bool {
 	return false
 }
 
+func (m *ConfigSecurity) GetEnableVerifyRegisterEmail() bool {
+	if m != nil {
+		return m.EnableVerifyRegisterEmail
+	}
+	return false
+}
+
 // 系统配置
 type Settings struct {
 	System   *ConfigSystem   `protobuf:"bytes,1,opt,name=system,proto3" json:"system,omitempty"`
@@ -1411,125 +1419,126 @@ func init() {
 func init() { proto.RegisterFile("api/v1/config.proto", fileDescriptor_321614cd6c9c1b8a) }
 
 var fileDescriptor_321614cd6c9c1b8a = []byte{
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+	0x90, 0xd6, 0x4b, 0x30, 0x45, 0x7b, 0xbe, 0x7f, 0xa3, 0x93, 0x1c, 0xdb, 0x4f, 0xc1, 0x7e, 0xe1,
+	0x2c, 0x47, 0x06, 0xbd, 0xcf, 0xff, 0xf9, 0x9f, 0xbf, 0x94, 0x29, 0xdd, 0x18, 0xf8, 0xcf, 0x55,
+	0x9d, 0xfb, 0x60, 0xa4, 0x7d, 0x8e, 0x5f, 0x35, 0xfe, 0xab, 0xb1, 0xbb, 0xda, 0x51, 0x75, 0xff,
+	0x96, 0x45, 0x82, 0x87, 0xe8, 0x72, 0xb3, 0xdf, 0x19, 0xac, 0x7c, 0x01, 0xff, 0xb8, 0xf4, 0x8c,
+	0x9e, 0x13, 0xb2, 0xf8, 0x38, 0xa2, 0x0f, 0x73, 0x8f, 0x37, 0x3e, 0x98, 0xfa, 0xd7, 0x17, 0x0b,
+	0x1e, 0xa1, 0xd3, 0x7b, 0x74, 0x73, 0xd5, 0xe9, 0x20, 0x11, 0xda, 0xd0, 0x9f, 0x91, 0x86, 0x8d,
+	0x1e, 0xdb, 0xd1, 0x6d, 0xa1, 0xaf, 0x17, 0xa1, 0x5b, 0x58, 0x70, 0x0f, 0xfd, 0x75, 0xe9, 0x7a,
+	0x11, 0x37, 0xce, 0x3e, 0x26, 0xf5, 0x97, 0x60, 0xb0, 0x17, 0xde, 0xe6, 0xa8, 0xbd, 0xd4, 0x15,
+	0x75, 0xb0, 0x85, 0x7e, 0x3a, 0xb4, 0x9d, 0xfb, 0xb1, 0xdd, 0x91, 0xfe, 0x9a, 0xac, 0xbb, 0xdc,
+	0x9d, 0x09, 0x03, 0x13, 0x9e, 0xdd, 0xea, 0xec, 0xb6, 0x1c, 0x3e, 0x40, 0xb7, 0x77, 0xfb, 0xdd,
+	0x62, 0x7b, 0xde, 0xd1, 0x19, 0x59, 0x7f, 0x09, 0x66, 0x89, 0x7c, 0xb7, 0x79, 0x2e, 0x18, 0xb6,
+	0xc0, 0x06, 0xf7, 0xd1, 0xeb, 0x06, 0x2d, 0x2a, 0x13, 0xa3, 0xed, 0xc5, 0x0f, 0xfe, 0xf6, 0x66,
+	0xbb, 0xf4, 0xe5, 0x9b, 0xed, 0xd2, 0xbf, 0xdf, 0x6c, 0x97, 0xbe, 0x78, 0xbb, 0x7d, 0xe7, 0xcb,
+	0xb7, 0xdb, 0x77, 0xbe, 0x7a, 0xbb, 0x7d, 0x87, 0xf8, 0xff, 0x15, 0xa7, 0xa5, 0xdf, 0xde, 0x9d,
+	0x48, 0x05, 0xb1, 0x8c, 0xfc, 0xd4, 0x9f, 0xcc, 0x9e, 0x5f, 0xac, 0xe1, 0x92, 0xdf, 0xfb, 0x7f,
+	0x00, 0x00, 0x00, 0xff, 0xff, 0x24, 0x4d, 0x78, 0x92, 0xea, 0x10, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -2340,6 +2349,16 @@ func (m *ConfigSecurity) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if m.EnableVerifyRegisterEmail {
+		i--
+		if m.EnableVerifyRegisterEmail {
+			dAtA[i] = 1
+		} else {
+			dAtA[i] = 0
+		}
+		i--
+		dAtA[i] = 0x60
+	}
 	if m.LoginRequired {
 		i--
 		if m.LoginRequired {
@@ -3225,6 +3244,9 @@ func (m *ConfigSecurity) Size() (n int) {
 	if m.LoginRequired {
 		n += 2
 	}
+	if m.EnableVerifyRegisterEmail {
+		n += 2
+	}
 	return n
 }
 
@@ -5350,6 +5372,26 @@ func (m *ConfigSecurity) Unmarshal(dAtA []byte) error {
 				}
 			}
 			m.LoginRequired = bool(v != 0)
+		case 12:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field EnableVerifyRegisterEmail", wireType)
+			}
+			var v int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowConfig
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				v |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			m.EnableVerifyRegisterEmail = bool(v != 0)
 		default:
 			iNdEx = preIndex
 			skippy, err := skipConfig(dAtA[iNdEx:])
diff --git a/api/v1/config.proto b/api/v1/config.proto
index 0ced2d8..2279b41 100644
--- a/api/v1/config.proto
+++ b/api/v1/config.proto
@@ -96,6 +96,7 @@ message ConfigSecurity {
   int32 max_document_size = 9;           // 文档最大大小
   repeated string document_allowed_ext = 10; // 文档允许的扩展名
   bool login_required = 11;                  // 是否登录才能访问
+  bool enable_verify_register_email = 12;    // 是否开启注册邮箱验证
 }
 
 // 系统配置
diff --git a/api/v1/user.pb.go b/api/v1/user.pb.go
index 6d02114..b1d071d 100644
--- a/api/v1/user.pb.go
+++ b/api/v1/user.pb.go
@@ -33,6 +33,31 @@ var _ = time.Kitchen
 // proto package needs to be updated.
 const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
 
+type EmailCodeType int32
+
+const (
+	EmailCodeType_EmailCodeTypeRegister EmailCodeType = 0
+	EmailCodeType_EmailCodeTypeLogin    EmailCodeType = 1
+)
+
+var EmailCodeType_name = map[int32]string{
+	0: "EmailCodeTypeRegister",
+	1: "EmailCodeTypeLogin",
+}
+
+var EmailCodeType_value = map[string]int32{
+	"EmailCodeTypeRegister": 0,
+	"EmailCodeTypeLogin":    1,
+}
+
+func (x EmailCodeType) String() string {
+	return proto.EnumName(EmailCodeType_name, int32(x))
+}
+
+func (EmailCodeType) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_b74e2e33d57193df, []int{0}
+}
+
 // 用户信息
 type User struct {
 	LoginAt       *time.Time `protobuf:"bytes,19,opt,name=login_at,json=loginAt,proto3,stdtime" json:"login_at,omitempty"`
@@ -253,6 +278,7 @@ type RegisterAndLoginRequest struct {
 	Captcha   string `protobuf:"bytes,3,opt,name=captcha,proto3" json:"captcha,omitempty"`
 	CaptchaId string `protobuf:"bytes,4,opt,name=captcha_id,json=captchaId,proto3" json:"captcha_id,omitempty"`
 	Email     string `protobuf:"bytes,5,opt,name=email,proto3" json:"email,omitempty"`
+	Code      string `protobuf:"bytes,6,opt,name=code,proto3" json:"code,omitempty"`
 }
 
 func (m *RegisterAndLoginRequest) Reset()         { *m = RegisterAndLoginRequest{} }
@@ -323,6 +349,81 @@ func (m *RegisterAndLoginRequest) GetEmail() string {
 	return ""
 }
 
+func (m *RegisterAndLoginRequest) GetCode() string {
+	if m != nil {
+		return m.Code
+	}
+	return ""
+}
+
+type SendEmailCodeRequest struct {
+	Email     string        `protobuf:"bytes,1,opt,name=email,proto3" json:"email,omitempty"`
+	Captcha   string        `protobuf:"bytes,2,opt,name=captcha,proto3" json:"captcha,omitempty"`
+	CaptchaId string        `protobuf:"bytes,3,opt,name=captcha_id,json=captchaId,proto3" json:"captcha_id,omitempty"`
+	Type      EmailCodeType `protobuf:"varint,4,opt,name=type,proto3,enum=api.v1.EmailCodeType" json:"type,omitempty"`
+}
+
+func (m *SendEmailCodeRequest) Reset()         { *m = SendEmailCodeRequest{} }
+func (m *SendEmailCodeRequest) String() string { return proto.CompactTextString(m) }
+func (*SendEmailCodeRequest) ProtoMessage()    {}
+func (*SendEmailCodeRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_b74e2e33d57193df, []int{2}
+}
+func (m *SendEmailCodeRequest) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *SendEmailCodeRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_SendEmailCodeRequest.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *SendEmailCodeRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SendEmailCodeRequest.Merge(m, src)
+}
+func (m *SendEmailCodeRequest) XXX_Size() int {
+	return m.Size()
+}
+func (m *SendEmailCodeRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_SendEmailCodeRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SendEmailCodeRequest proto.InternalMessageInfo
+
+func (m *SendEmailCodeRequest) GetEmail() string {
+	if m != nil {
+		return m.Email
+	}
+	return ""
+}
+
+func (m *SendEmailCodeRequest) GetCaptcha() string {
+	if m != nil {
+		return m.Captcha
+	}
+	return ""
+}
+
+func (m *SendEmailCodeRequest) GetCaptchaId() string {
+	if m != nil {
+		return m.CaptchaId
+	}
+	return ""
+}
+
+func (m *SendEmailCodeRequest) GetType() EmailCodeType {
+	if m != nil {
+		return m.Type
+	}
+	return EmailCodeType_EmailCodeTypeRegister
+}
+
 // 查询验证码请求
 type GetUserCaptchaRequest struct {
 	Type string `protobuf:"bytes,1,opt,name=type,proto3" json:"type,omitempty"`
@@ -332,7 +433,7 @@ func (m *GetUserCaptchaRequest) Reset()         { *m = GetUserCaptchaRequest{} }
 func (m *GetUserCaptchaRequest) String() string { return proto.CompactTextString(m) }
 func (*GetUserCaptchaRequest) ProtoMessage()    {}
 func (*GetUserCaptchaRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{2}
+	return fileDescriptor_b74e2e33d57193df, []int{3}
 }
 func (m *GetUserCaptchaRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -378,7 +479,7 @@ func (m *LoginReply) Reset()         { *m = LoginReply{} }
 func (m *LoginReply) String() string { return proto.CompactTextString(m) }
 func (*LoginReply) ProtoMessage()    {}
 func (*LoginReply) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{3}
+	return fileDescriptor_b74e2e33d57193df, []int{4}
 }
 func (m *LoginReply) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -430,7 +531,7 @@ func (m *DeleteUserRequest) Reset()         { *m = DeleteUserRequest{} }
 func (m *DeleteUserRequest) String() string { return proto.CompactTextString(m) }
 func (*DeleteUserRequest) ProtoMessage()    {}
 func (*DeleteUserRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{4}
+	return fileDescriptor_b74e2e33d57193df, []int{5}
 }
 func (m *DeleteUserRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -475,7 +576,7 @@ func (m *GetUserRequest) Reset()         { *m = GetUserRequest{} }
 func (m *GetUserRequest) String() string { return proto.CompactTextString(m) }
 func (*GetUserRequest) ProtoMessage()    {}
 func (*GetUserRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{5}
+	return fileDescriptor_b74e2e33d57193df, []int{6}
 }
 func (m *GetUserRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -524,7 +625,7 @@ func (m *FindPasswordRequest) Reset()         { *m = FindPasswordRequest{} }
 func (m *FindPasswordRequest) String() string { return proto.CompactTextString(m) }
 func (*FindPasswordRequest) ProtoMessage()    {}
 func (*FindPasswordRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{6}
+	return fileDescriptor_b74e2e33d57193df, []int{7}
 }
 func (m *FindPasswordRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -605,7 +706,7 @@ func (m *ListUserRequest) Reset()         { *m = ListUserRequest{} }
 func (m *ListUserRequest) String() string { return proto.CompactTextString(m) }
 func (*ListUserRequest) ProtoMessage()    {}
 func (*ListUserRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{7}
+	return fileDescriptor_b74e2e33d57193df, []int{8}
 }
 func (m *ListUserRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -707,7 +808,7 @@ func (m *ListUserReply) Reset()         { *m = ListUserReply{} }
 func (m *ListUserReply) String() string { return proto.CompactTextString(m) }
 func (*ListUserReply) ProtoMessage()    {}
 func (*ListUserReply) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{8}
+	return fileDescriptor_b74e2e33d57193df, []int{9}
 }
 func (m *ListUserReply) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -762,7 +863,7 @@ func (m *GetUserCaptchaReply) Reset()         { *m = GetUserCaptchaReply{} }
 func (m *GetUserCaptchaReply) String() string { return proto.CompactTextString(m) }
 func (*GetUserCaptchaReply) ProtoMessage()    {}
 func (*GetUserCaptchaReply) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{9}
+	return fileDescriptor_b74e2e33d57193df, []int{10}
 }
 func (m *GetUserCaptchaReply) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -830,7 +931,7 @@ func (m *UpdateUserPasswordRequest) Reset()         { *m = UpdateUserPasswordReq
 func (m *UpdateUserPasswordRequest) String() string { return proto.CompactTextString(m) }
 func (*UpdateUserPasswordRequest) ProtoMessage()    {}
 func (*UpdateUserPasswordRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{10}
+	return fileDescriptor_b74e2e33d57193df, []int{11}
 }
 func (m *UpdateUserPasswordRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -889,7 +990,7 @@ func (m *GetUserPermissionsReply) Reset()         { *m = GetUserPermissionsReply
 func (m *GetUserPermissionsReply) String() string { return proto.CompactTextString(m) }
 func (*GetUserPermissionsReply) ProtoMessage()    {}
 func (*GetUserPermissionsReply) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{11}
+	return fileDescriptor_b74e2e33d57193df, []int{12}
 }
 func (m *GetUserPermissionsReply) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -938,7 +1039,7 @@ func (m *SetUserRequest) Reset()         { *m = SetUserRequest{} }
 func (m *SetUserRequest) String() string { return proto.CompactTextString(m) }
 func (*SetUserRequest) ProtoMessage()    {}
 func (*SetUserRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{12}
+	return fileDescriptor_b74e2e33d57193df, []int{13}
 }
 func (m *SetUserRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1017,7 +1118,7 @@ func (m *Dynamic) Reset()         { *m = Dynamic{} }
 func (m *Dynamic) String() string { return proto.CompactTextString(m) }
 func (*Dynamic) ProtoMessage()    {}
 func (*Dynamic) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{13}
+	return fileDescriptor_b74e2e33d57193df, []int{14}
 }
 func (m *Dynamic) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1105,7 +1206,7 @@ func (m *ListUserDynamicRequest) Reset()         { *m = ListUserDynamicRequest{}
 func (m *ListUserDynamicRequest) String() string { return proto.CompactTextString(m) }
 func (*ListUserDynamicRequest) ProtoMessage()    {}
 func (*ListUserDynamicRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{14}
+	return fileDescriptor_b74e2e33d57193df, []int{15}
 }
 func (m *ListUserDynamicRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1158,7 +1259,7 @@ func (m *ListUserDynamicReply) Reset()         { *m = ListUserDynamicReply{} }
 func (m *ListUserDynamicReply) String() string { return proto.CompactTextString(m) }
 func (*ListUserDynamicReply) ProtoMessage()    {}
 func (*ListUserDynamicReply) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{15}
+	return fileDescriptor_b74e2e33d57193df, []int{16}
 }
 func (m *ListUserDynamicReply) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1215,7 +1316,7 @@ func (m *Sign) Reset()         { *m = Sign{} }
 func (m *Sign) String() string { return proto.CompactTextString(m) }
 func (*Sign) ProtoMessage()    {}
 func (*Sign) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{16}
+	return fileDescriptor_b74e2e33d57193df, []int{17}
 }
 func (m *Sign) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1295,7 +1396,7 @@ func (m *ListUserDownloadRequest) Reset()         { *m = ListUserDownloadRequest
 func (m *ListUserDownloadRequest) String() string { return proto.CompactTextString(m) }
 func (*ListUserDownloadRequest) ProtoMessage()    {}
 func (*ListUserDownloadRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{17}
+	return fileDescriptor_b74e2e33d57193df, []int{18}
 }
 func (m *ListUserDownloadRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1347,7 +1448,7 @@ func (m *ListUserDownloadReply) Reset()         { *m = ListUserDownloadReply{} }
 func (m *ListUserDownloadReply) String() string { return proto.CompactTextString(m) }
 func (*ListUserDownloadReply) ProtoMessage()    {}
 func (*ListUserDownloadReply) Descriptor() ([]byte, []int) {
-	return fileDescriptor_b74e2e33d57193df, []int{18}
+	return fileDescriptor_b74e2e33d57193df, []int{19}
 }
 func (m *ListUserDownloadReply) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1391,8 +1492,10 @@ func (m *ListUserDownloadReply) GetDownload() []*Download {
 }
 
 func init() {
+	proto.RegisterEnum("api.v1.EmailCodeType", EmailCodeType_name, EmailCodeType_value)
 	proto.RegisterType((*User)(nil), "api.v1.User")
 	proto.RegisterType((*RegisterAndLoginRequest)(nil), "api.v1.RegisterAndLoginRequest")
+	proto.RegisterType((*SendEmailCodeRequest)(nil), "api.v1.SendEmailCodeRequest")
 	proto.RegisterType((*GetUserCaptchaRequest)(nil), "api.v1.GetUserCaptchaRequest")
 	proto.RegisterType((*LoginReply)(nil), "api.v1.LoginReply")
 	proto.RegisterType((*DeleteUserRequest)(nil), "api.v1.DeleteUserRequest")
@@ -1415,113 +1518,119 @@ func init() {
 func init() { proto.RegisterFile("api/v1/user.proto", fileDescriptor_b74e2e33d57193df) }
 
 var fileDescriptor_b74e2e33d57193df = []byte{
-	// 1687 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xa4, 0x58, 0x4f, 0x6f, 0x23, 0x49,
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+	0xff, 0x01, 0x00, 0x00, 0xff, 0xff, 0x85, 0xf6, 0xe0, 0xad, 0xe3, 0x14, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1577,6 +1686,8 @@ type UserAPIClient interface {
 	FindPasswordStepOne(ctx context.Context, in *FindPasswordRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
 	// 找回密码：第二步，修改密码
 	FindPasswordStepTwo(ctx context.Context, in *FindPasswordRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
+	// 发送邮箱验证码。
+	SendEmailCode(ctx context.Context, in *SendEmailCodeRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
 }
 
 type userAPIClient struct {
@@ -1758,6 +1869,15 @@ func (c *userAPIClient) FindPasswordStepTwo(ctx context.Context, in *FindPasswor
 	return out, nil
 }
 
+func (c *userAPIClient) SendEmailCode(ctx context.Context, in *SendEmailCodeRequest, opts ...grpc.CallOption) (*emptypb.Empty, error) {
+	out := new(emptypb.Empty)
+	err := c.cc.Invoke(ctx, "/api.v1.UserAPI/SendEmailCode", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // UserAPIServer is the server API for UserAPI service.
 type UserAPIServer interface {
 	// 用户注册
@@ -1801,6 +1921,8 @@ type UserAPIServer interface {
 	FindPasswordStepOne(context.Context, *FindPasswordRequest) (*emptypb.Empty, error)
 	// 找回密码：第二步，修改密码
 	FindPasswordStepTwo(context.Context, *FindPasswordRequest) (*emptypb.Empty, error)
+	// 发送邮箱验证码。
+	SendEmailCode(context.Context, *SendEmailCodeRequest) (*emptypb.Empty, error)
 }
 
 // UnimplementedUserAPIServer can be embedded to have forward compatible implementations.
@@ -1864,6 +1986,9 @@ func (*UnimplementedUserAPIServer) FindPasswordStepOne(ctx context.Context, req
 func (*UnimplementedUserAPIServer) FindPasswordStepTwo(ctx context.Context, req *FindPasswordRequest) (*emptypb.Empty, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method FindPasswordStepTwo not implemented")
 }
+func (*UnimplementedUserAPIServer) SendEmailCode(ctx context.Context, req *SendEmailCodeRequest) (*emptypb.Empty, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SendEmailCode not implemented")
+}
 
 func RegisterUserAPIServer(s *grpc.Server, srv UserAPIServer) {
 	s.RegisterService(&_UserAPI_serviceDesc, srv)
@@ -2211,6 +2336,24 @@ func _UserAPI_FindPasswordStepTwo_Handler(srv interface{}, ctx context.Context,
 	return interceptor(ctx, in, info, handler)
 }
 
+func _UserAPI_SendEmailCode_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SendEmailCodeRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(UserAPIServer).SendEmailCode(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/api.v1.UserAPI/SendEmailCode",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(UserAPIServer).SendEmailCode(ctx, req.(*SendEmailCodeRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _UserAPI_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "api.v1.UserAPI",
 	HandlerType: (*UserAPIServer)(nil),
@@ -2291,6 +2434,10 @@ var _UserAPI_serviceDesc = grpc.ServiceDesc{
 			MethodName: "FindPasswordStepTwo",
 			Handler:    _UserAPI_FindPasswordStepTwo_Handler,
 		},
+		{
+			MethodName: "SendEmailCode",
+			Handler:    _UserAPI_SendEmailCode_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "api/v1/user.proto",
@@ -2512,6 +2659,13 @@ func (m *RegisterAndLoginRequest) MarshalToSizedBuffer(dAtA []byte) (int, error)
 	_ = i
 	var l int
 	_ = l
+	if len(m.Code) > 0 {
+		i -= len(m.Code)
+		copy(dAtA[i:], m.Code)
+		i = encodeVarintUser(dAtA, i, uint64(len(m.Code)))
+		i--
+		dAtA[i] = 0x32
+	}
 	if len(m.Email) > 0 {
 		i -= len(m.Email)
 		copy(dAtA[i:], m.Email)
@@ -2550,6 +2704,55 @@ func (m *RegisterAndLoginRequest) MarshalToSizedBuffer(dAtA []byte) (int, error)
 	return len(dAtA) - i, nil
 }
 
+func (m *SendEmailCodeRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *SendEmailCodeRequest) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *SendEmailCodeRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.Type != 0 {
+		i = encodeVarintUser(dAtA, i, uint64(m.Type))
+		i--
+		dAtA[i] = 0x20
+	}
+	if len(m.CaptchaId) > 0 {
+		i -= len(m.CaptchaId)
+		copy(dAtA[i:], m.CaptchaId)
+		i = encodeVarintUser(dAtA, i, uint64(len(m.CaptchaId)))
+		i--
+		dAtA[i] = 0x1a
+	}
+	if len(m.Captcha) > 0 {
+		i -= len(m.Captcha)
+		copy(dAtA[i:], m.Captcha)
+		i = encodeVarintUser(dAtA, i, uint64(len(m.Captcha)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if len(m.Email) > 0 {
+		i -= len(m.Email)
+		copy(dAtA[i:], m.Email)
+		i = encodeVarintUser(dAtA, i, uint64(len(m.Email)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
 func (m *GetUserCaptchaRequest) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
@@ -3522,6 +3725,34 @@ func (m *RegisterAndLoginRequest) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovUser(uint64(l))
 	}
+	l = len(m.Code)
+	if l > 0 {
+		n += 1 + l + sovUser(uint64(l))
+	}
+	return n
+}
+
+func (m *SendEmailCodeRequest) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.Email)
+	if l > 0 {
+		n += 1 + l + sovUser(uint64(l))
+	}
+	l = len(m.Captcha)
+	if l > 0 {
+		n += 1 + l + sovUser(uint64(l))
+	}
+	l = len(m.CaptchaId)
+	if l > 0 {
+		n += 1 + l + sovUser(uint64(l))
+	}
+	if m.Type != 0 {
+		n += 1 + sovUser(uint64(m.Type))
+	}
 	return n
 }
 
@@ -4803,6 +5034,203 @@ func (m *RegisterAndLoginRequest) Unmarshal(dAtA []byte) error {
 			}
 			m.Email = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
+		case 6:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Code", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowUser
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthUser
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthUser
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Code = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipUser(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthUser
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *SendEmailCodeRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowUser
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: SendEmailCodeRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: SendEmailCodeRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Email", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowUser
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthUser
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthUser
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Email = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Captcha", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowUser
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthUser
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthUser
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Captcha = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 3:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field CaptchaId", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowUser
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthUser
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthUser
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.CaptchaId = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 4:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Type", wireType)
+			}
+			m.Type = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowUser
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.Type |= EmailCodeType(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
 		default:
 			iNdEx = preIndex
 			skippy, err := skipUser(dAtA[iNdEx:])
diff --git a/api/v1/user.pb.gw.go b/api/v1/user.pb.gw.go
index 9cb420c..ac0b5ec 100644
--- a/api/v1/user.pb.gw.go
+++ b/api/v1/user.pb.gw.go
@@ -612,6 +612,40 @@ func local_request_UserAPI_FindPasswordStepTwo_0(ctx context.Context, marshaler
 
 }
 
+func request_UserAPI_SendEmailCode_0(ctx context.Context, marshaler runtime.Marshaler, client UserAPIClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var protoReq SendEmailCodeRequest
+	var metadata runtime.ServerMetadata
+
+	newReader, berr := utilities.IOReaderFactory(req.Body)
+	if berr != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", berr)
+	}
+	if err := marshaler.NewDecoder(newReader()).Decode(&protoReq); err != nil && err != io.EOF {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+
+	msg, err := client.SendEmailCode(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+
+}
+
+func local_request_UserAPI_SendEmailCode_0(ctx context.Context, marshaler runtime.Marshaler, server UserAPIServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var protoReq SendEmailCodeRequest
+	var metadata runtime.ServerMetadata
+
+	newReader, berr := utilities.IOReaderFactory(req.Body)
+	if berr != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", berr)
+	}
+	if err := marshaler.NewDecoder(newReader()).Decode(&protoReq); err != nil && err != io.EOF {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+
+	msg, err := server.SendEmailCode(ctx, &protoReq)
+	return msg, metadata, err
+
+}
+
 // RegisterUserAPIHandlerServer registers the http handlers for service UserAPI to "mux".
 // UnaryRPC     :call UserAPIServer directly.
 // StreamingRPC :currently unsupported pending https://github.com/grpc/grpc-go/issues/906.
@@ -1055,6 +1089,29 @@ func RegisterUserAPIHandlerServer(ctx context.Context, mux *runtime.ServeMux, se
 
 	})
 
+	mux.Handle("POST", pattern_UserAPI_SendEmailCode_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		rctx, err := runtime.AnnotateIncomingContext(ctx, mux, req)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_UserAPI_SendEmailCode_0(rctx, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		ctx = runtime.NewServerMetadataContext(ctx, md)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+
+		forward_UserAPI_SendEmailCode_0(ctx, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+
+	})
+
 	return nil
 }
 
@@ -1476,6 +1533,26 @@ func RegisterUserAPIHandlerClient(ctx context.Context, mux *runtime.ServeMux, cl
 
 	})
 
+	mux.Handle("POST", pattern_UserAPI_SendEmailCode_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		rctx, err := runtime.AnnotateContext(ctx, mux, req)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_UserAPI_SendEmailCode_0(rctx, inboundMarshaler, client, req, pathParams)
+		ctx = runtime.NewServerMetadataContext(ctx, md)
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+
+		forward_UserAPI_SendEmailCode_0(ctx, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+
+	})
+
 	return nil
 }
 
@@ -1517,6 +1594,8 @@ var (
 	pattern_UserAPI_FindPasswordStepOne_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 2, 4}, []string{"api", "v1", "user", "findpassword", "stepone"}, "", runtime.AssumeColonVerbOpt(true)))
 
 	pattern_UserAPI_FindPasswordStepTwo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 2, 4}, []string{"api", "v1", "user", "findpassword", "steptwo"}, "", runtime.AssumeColonVerbOpt(true)))
+
+	pattern_UserAPI_SendEmailCode_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 2, 4}, []string{"api", "v1", "user", "email", "code"}, "", runtime.AssumeColonVerbOpt(true)))
 )
 
 var (
@@ -1557,4 +1636,6 @@ var (
 	forward_UserAPI_FindPasswordStepOne_0 = runtime.ForwardResponseMessage
 
 	forward_UserAPI_FindPasswordStepTwo_0 = runtime.ForwardResponseMessage
+
+	forward_UserAPI_SendEmailCode_0 = runtime.ForwardResponseMessage
 )
diff --git a/api/v1/user.proto b/api/v1/user.proto
index 144ab25..839beb3 100644
--- a/api/v1/user.proto
+++ b/api/v1/user.proto
@@ -51,6 +51,20 @@ message RegisterAndLoginRequest {
   string captcha = 3;    // 验证码
   string captcha_id = 4; // 验证码ID
   string email = 5;      // 邮箱
+  string code = 6; // 邮箱验证码(如果用户注册需要验证邮箱，则必须传递该参数)
+}
+
+enum EmailCodeType {
+  EmailCodeTypeRegister = 0; // 注册
+  EmailCodeTypeLogin = 1;    // 登录
+  // EmailCodeTypeFindPassword = 2; // 找回密码
+}
+
+message SendEmailCodeRequest {
+  string email = 1; // 邮箱
+  string captcha = 2;
+  string captcha_id = 3;
+  EmailCodeType type = 4;
 }
 
 // 查询验证码请求
@@ -324,4 +338,12 @@ service UserAPI {
       body : '*',
     };
   }
+
+  // 发送邮箱验证码。
+  rpc SendEmailCode(SendEmailCodeRequest) returns (google.protobuf.Empty) {
+    option (google.api.http) = {
+      post : '/api/v1/user/email/code',
+      body : '*',
+    };
+  }
 }
\ No newline at end of file
diff --git a/biz/comment.go b/biz/comment.go
index bc0bb63..89c3e95 100644
--- a/biz/comment.go
+++ b/biz/comment.go
@@ -43,7 +43,7 @@ func (s *CommentAPIService) CreateComment(ctx context.Context, req *pb.CreateCom
 
 	// 评论验证码错误
 	cfg := s.dbModel.GetConfigOfSecurity(model.ConfigSecurityEnableCaptchaComment)
-	if cfg.EnableCaptchaComment && !captcha.VerifyCaptcha(req.CaptchaId, req.Captcha) {
+	if cfg.EnableCaptchaComment && !captcha.VerifyCaptcha(req.CaptchaId, req.Captcha, true) {
 		return nil, status.Errorf(codes.InvalidArgument, "验证码错误")
 	}
 
diff --git a/biz/user.go b/biz/user.go
index a7940cc..4eea1b1 100644
--- a/biz/user.go
+++ b/biz/user.go
@@ -72,6 +72,7 @@ func (s *UserAPIService) Register(ctx context.Context, req *pb.RegisterAndLoginR
 		model.ConfigSecurityEnableCaptchaRegister,
 		model.ConfigSecurityEnableRegister,
 		model.ConfigSecurityIsClose,
+		model.ConfigSecurityEnableVerifyRegisterEmail,
 	)
 
 	if !cfg.EnableRegister {
@@ -82,10 +83,23 @@ func (s *UserAPIService) Register(ctx context.Context, req *pb.RegisterAndLoginR
 		return nil, status.Errorf(codes.InvalidArgument, "网站已关闭，暂时不允许注册")
 	}
 
-	if cfg.EnableCaptchaRegister && !captcha.VerifyCaptcha(req.CaptchaId, req.Captcha) {
+	if cfg.EnableCaptchaRegister && !captcha.VerifyCaptcha(req.CaptchaId, req.Captcha, true) {
 		return nil, status.Errorf(codes.InvalidArgument, "验证码错误")
 	}
 
+	var latestEmailCode model.EmailCode
+	if cfg.EnableVerifyRegisterEmail { // 启用了邮箱验证
+		latestEmailCode = s.dbModel.GetLatestEmailCode(req.Email, int32(pb.EmailCodeType_EmailCodeTypeRegister))
+		if latestEmailCode.Id == 0 || latestEmailCode.Code != req.Code || latestEmailCode.IsUsed {
+			return nil, status.Errorf(codes.InvalidArgument, "邮箱验证码错误")
+		}
+
+		// 邮箱验证码是否已过期
+		if latestEmailCode.CreatedAt.Add(time.Minute * 30).Before(time.Now()) {
+			return nil, status.Errorf(codes.InvalidArgument, "邮箱验证码已过期")
+		}
+	}
+
 	exist, _ := s.dbModel.GetUserByUsername(req.Username, "id")
 	if exist.Id > 0 {
 		return nil, status.Errorf(codes.AlreadyExists, "用户名已存在")
@@ -133,6 +147,11 @@ func (s *UserAPIService) Register(ctx context.Context, req *pb.RegisterAndLoginR
 	pbUser := &pb.User{}
 	util.CopyStruct(&user, pbUser)
 
+	if latestEmailCode.Id > 0 {
+		// 标记邮箱验证码已使用
+		s.dbModel.UpdateEmailCode(&model.EmailCode{Id: latestEmailCode.Id, IsUsed: true}, "is_used")
+	}
+
 	return &pb.LoginReply{Token: token, User: pbUser}, nil
 }
 
@@ -146,7 +165,7 @@ func (s *UserAPIService) Login(ctx context.Context, req *pb.RegisterAndLoginRequ
 
 	// 如果启用了验证码，则需要进行验证码验证
 	cfg := s.dbModel.GetConfigOfSecurity(model.ConfigSecurityEnableCaptchaLogin)
-	if cfg.EnableCaptchaLogin && !captcha.VerifyCaptcha(req.CaptchaId, req.Captcha) {
+	if cfg.EnableCaptchaLogin && !captcha.VerifyCaptcha(req.CaptchaId, req.Captcha, true) {
 		return nil, status.Errorf(codes.InvalidArgument, "验证码错误")
 	}
 
@@ -633,7 +652,7 @@ func (s *UserAPIService) FindPasswordStepOne(ctx context.Context, req *v1.FindPa
 	}
 
 	cfgSec := s.dbModel.GetConfigOfSecurity(model.ConfigSecurityEnableCaptchaFindPassword)
-	if cfgSec.EnableCaptchaFindPassword && !captcha.VerifyCaptcha(req.CaptchaId, req.Captcha) {
+	if cfgSec.EnableCaptchaFindPassword && !captcha.VerifyCaptcha(req.CaptchaId, req.Captcha, true) {
 		return nil, status.Errorf(codes.InvalidArgument, "验证码错误")
 	}
 
@@ -709,7 +728,7 @@ func (s *UserAPIService) FindPasswordStepTwo(ctx context.Context, req *v1.FindPa
 	}
 
 	cfgSec := s.dbModel.GetConfigOfSecurity(model.ConfigSecurityEnableCaptchaFindPassword)
-	if cfgSec.EnableCaptchaFindPassword && !captcha.VerifyCaptcha(req.CaptchaId, req.Captcha) {
+	if cfgSec.EnableCaptchaFindPassword && !captcha.VerifyCaptcha(req.CaptchaId, req.Captcha, true) {
 		return nil, status.Errorf(codes.InvalidArgument, "验证码错误")
 	}
 
@@ -762,3 +781,83 @@ func (s *UserAPIService) ListUserDownload(ctx context.Context, req *v1.ListUserD
 	}
 	return &v1.ListUserDownloadReply{Download: downloads, Total: total}, nil
 }
+
+// 发送邮箱验证码
+// TODO: 当前只对注册功能生效。后续可以考虑对其他功能
+func (s *UserAPIService) SendEmailCode(ctx context.Context, req *v1.SendEmailCodeRequest) (res *emptypb.Empty, err error) {
+	if !util.IsValidEmail(req.Email) {
+		return nil, status.Errorf(codes.InvalidArgument, "邮箱格式不正确")
+	}
+
+	existUser, _ := s.dbModel.GetUserByEmail(req.Email, "id")
+	if existUser.Id > 0 {
+		return nil, status.Errorf(codes.AlreadyExists, "邮箱已存在")
+	}
+
+	cfgSec := s.dbModel.GetConfigOfSecurity(model.ConfigSecurityEnableCaptchaRegister, model.ConfigSecurityEnableRegister, model.ConfigSecurityEnableVerifyRegisterEmail)
+	if !cfgSec.EnableRegister {
+		return nil, status.Errorf(codes.InvalidArgument, "系统未开放注册")
+	}
+
+	if !cfgSec.EnableVerifyRegisterEmail {
+		return nil, status.Errorf(codes.InvalidArgument, "系统未开启注册邮箱验证功能")
+	}
+
+	if cfgSec.EnableCaptchaRegister && !captcha.VerifyCaptcha(req.CaptchaId, req.Captcha, false) {
+		return nil, status.Errorf(codes.InvalidArgument, "验证码错误")
+	}
+
+	code := s.dbModel.GetLatestEmailCode(req.Email, int32(req.Type))
+	// 如果邮件发送早于1分钟，则不再发送
+	if code.Id > 0 && time.Now().Sub(*code.CreatedAt).Seconds() < 60 {
+		return nil, status.Errorf(codes.InvalidArgument, "发送太频繁，请稍后再试")
+	}
+
+	ip := ""
+	if ips, _ := util.GetGRPCRemoteIP(ctx); len(ips) > 0 {
+		ip = ips[0]
+	}
+
+	cfgSystem := s.dbModel.GetConfigOfSystem(model.ConfigSystemSitename, model.ConfigSystemDomain)
+
+	codeStr := unchained.GetRandomString(4)
+	body := fmt.Sprintf(`
+	<div class="wrapper" style="margin: 20px auto 0; width: 500px; padding-top:16px; padding-bottom:10px;">
+        <div class="content" style="background: none repeat scroll 0 0 #FFFFFF; border: 1px solid #E9E9E9; margin: 2px 0 0; padding: 30px;">
+            <p>您好: </p>
+            <p>欢迎注册成为 <a href="%s">%s</a> 用户。您本次注册验证码为：%s，30分钟内有效。 </p>
+        </div>
+    </div>
+	`,
+		cfgSystem.Domain,
+		cfgSystem.Sitename,
+		codeStr,
+	)
+
+	// 发送邮件
+	err = s.dbModel.SendMail(
+		"邮箱验证码",
+		req.Email,
+		body,
+	)
+
+	// 生成验证码
+	code = model.EmailCode{
+		Email:   req.Email,
+		Code:    codeStr,
+		Ip:      ip,
+		Success: true,
+	}
+
+	if err != nil {
+		code.Error = err.Error()
+		code.Success = false
+	}
+
+	err = s.dbModel.CreateEmailCode(&code)
+	if err != nil {
+		s.logger.Error("创建验证码失败", zap.Error(err))
+		return nil, status.Errorf(codes.Internal, err.Error())
+	}
+	return &emptypb.Empty{}, nil
+}
diff --git a/model/config.go b/model/config.go
index 1b0fb05..3704063 100644
--- a/model/config.go
+++ b/model/config.go
@@ -243,6 +243,7 @@ const (
 	ConfigSecurityDocumentAllowedExt        = "document_allowed_ext"         // 允许上传的文档类型
 	ConfigSecurityLoginRequired             = "login_required"               // 是否需要登录才能查看文档
 	ConfigSecurityAttachmentRetentionMinute = "attachment_retention_minute"  // 被删除的附件，保留时长，单位分钟
+	ConfigSecurityEnableVerifyRegisterEmail = "enable_verify_register_email" // 是否开启注册邮箱验证
 )
 
 type ConfigSecurity struct {
@@ -257,6 +258,7 @@ type ConfigSecurity struct {
 	EnableCaptchaRegister     bool     `json:"enable_captcha_register"`      // 是否启用注册验证码
 	EnableCaptchaComment      bool     `json:"enable_captcha_comment"`       // 是否启用评论验证码
 	EnableCaptchaFindPassword bool     `json:"enable_captcha_find_password"` // 找回密码是否需要验证码
+	EnableVerifyRegisterEmail bool     `json:"enable_verify_register_email"` // 是否开启注册邮箱验证
 	DocumentAllowedExt        []string `json:"document_allowed_ext"`         // 允许上传的文档类型
 	LoginRequired             bool     `json:"login_required"`               // 是否需要登录才能查看文档
 }
@@ -655,6 +657,7 @@ func (m *DBModel) initConfig() (err error) {
 	cfgs := []Config{
 		// 系统配置项
 		{Category: ConfigCategorySystem, Name: ConfigSystemSitename, Label: "网站名称", Value: "魔豆文库", Placeholder: "请输入您网站的名称，如：魔豆文库", InputType: InputTypeText, Sort: 10, Options: ""},
+		{Category: ConfigCategorySystem, Name: ConfigSystemDomain, Label: "【重要】网站域名", Value: "https://moredoc.mnt.ltd", Placeholder: "请输入您网站的域名访问地址，带 https:// 或 http:// 如 https://moredoc.mnt.ltd，用以生成网站地图sitemap", InputType: InputTypeText, Sort: 11, Options: ""},
 		{Category: ConfigCategorySystem, Name: ConfigSystemTitle, Label: "首页标题", Value: "MOREDOC · 魔豆文库", Placeholder: "请输入您网站的首页标题，如：魔豆文库，强大、专业的文库系统", InputType: InputTypeText, Sort: 20, Options: ""},
 		{Category: ConfigCategorySystem, Name: ConfigSystemKeywords, Label: "网站关键字", Value: "MOREDOC · 魔豆文库", Placeholder: "请输入您网站的关键字", InputType: InputTypeText, Sort: 30, Options: ""},
 		{Category: ConfigCategorySystem, Name: ConfigSystemDescription, Label: "网站描述", Value: "MOREDOC · 魔豆文库", Placeholder: "请输入您网站的描述", InputType: InputTypeTextarea, Sort: 40, Options: ""},
@@ -665,7 +668,6 @@ func (m *DBModel) initConfig() (err error) {
 		{Category: ConfigCategorySystem, Name: ConfigSystemLoginBackground, Label: "登录页背景图", Value: "", Placeholder: "请上传一张图片作为登录页背景图", InputType: InputTypeImage, Sort: 63, Options: ""},
 		{Category: ConfigCategorySystem, Name: ConfigSystemSecIcp, Label: "京公网安备", Value: "", Placeholder: "请输入您网站的京公网安备备案号", InputType: InputTypeText, Sort: 68, Options: ""},
 		{Category: ConfigCategorySystem, Name: ConfigSystemIcp, Label: "网站备案号", Value: "", Placeholder: "请输入您网站的备案号", InputType: InputTypeText, Sort: 69, Options: ""},
-		{Category: ConfigCategorySystem, Name: ConfigSystemDomain, Label: "网站域名", Value: "https://moredoc.mnt.ltd", Placeholder: "请输入您网站的域名访问地址，带 https:// 或 http:// 如 https://moredoc.mnt.ltd，用以生成网站地图sitemap", InputType: InputTypeText, Sort: 70, Options: ""},
 		{Category: ConfigCategorySystem, Name: ConfigSystemCopyrightStartYear, Label: "版权起始年", Value: "2019", Placeholder: "请输入您网站版权起始年，如：2019，则前台会显示如 ©2019 - 20xx 的字样", InputType: InputTypeText, Sort: 80, Options: ""},
 		{Category: ConfigCategorySystem, Name: ConfigSystemAnalytics, Label: "网站统计代码", Value: "", Placeholder: "请输入您网站的统计代码，当前只支持百度统计", InputType: InputTypeTextarea, Sort: 90, Options: ""},
 
@@ -689,6 +691,7 @@ func (m *DBModel) initConfig() (err error) {
 		{Category: ConfigCategorySecurity, Name: ConfigSecurityEnableCaptchaRegister, Label: "是否开启注册验证码", Value: "true", Placeholder: "请选择是否开启注册验证码", InputType: InputTypeSwitch, Sort: 20, Options: ""},
 		{Category: ConfigCategorySecurity, Name: ConfigSecurityEnableCaptchaComment, Label: "是否开启评论验证码", Value: "true", Placeholder: "请选择是否开启评论验证码", InputType: InputTypeSwitch, Sort: 21, Options: ""},
 		{Category: ConfigCategorySecurity, Name: ConfigSecurityEnableCaptchaFindPassword, Label: "是否开启找回密码验证码", Value: "true", Placeholder: "请选择是否开启找回密码验证码", InputType: InputTypeSwitch, Sort: 22, Options: ""},
+		{Category: ConfigCategorySecurity, Name: ConfigSecurityEnableVerifyRegisterEmail, Label: "是否开启注册邮箱验证", Value: "false", Placeholder: "用户注册时是否需要验证邮箱", InputType: InputTypeSwitch, Sort: 50, Options: ""},
 
 		// 底部链接
 		{Category: ConfigCategoryFooter, Name: ConfigFooterAbout, Label: "关于我们", Value: "/article/about", Placeholder: "请输入关于我们的链接地址，留空表示不显示", InputType: InputTypeText, Sort: 24, Options: ""},
diff --git a/model/emailCode.go b/model/emailCode.go
new file mode 100644
index 0000000..07392f4
--- /dev/null
+++ b/model/emailCode.go
@@ -0,0 +1,133 @@
+package model
+
+import (
+	"time"
+
+	"go.uber.org/zap"
+	"gorm.io/gorm"
+)
+
+type EmailCode struct {
+	Id        int64      `form:"id" json:"id,omitempty" gorm:"primaryKey;autoIncrement;column:id;comment:;"`
+	Email     string     `form:"email" json:"email,omitempty" gorm:"column:email;type:varchar(64);size:64;index:idx_email;comment:邮箱;"`
+	Ip        string     `form:"ip" json:"ip,omitempty" gorm:"column:ip;type:varchar(64);size:64;comment:IP地址;"`
+	Code      string     `form:"code" json:"code,omitempty" gorm:"column:code;type:varchar(16);size:16;comment:邮箱验证码;"`
+	CodeType  int        `form:"code_type" json:"code_type,omitempty" gorm:"column:code_type;type:smallint(6);size:6;default:0;comment:验证码类型,0注册,1登录;"`
+	Success   bool       `form:"success" json:"success,omitempty" gorm:"column:success;type:tinyint(1);size:1;default:0;comment:是否发送成功;"`
+	Error     string     `form:"error" json:"error,omitempty" gorm:"column:error;type:text;comment:错误信息;"`
+	CreatedAt *time.Time `form:"created_at" json:"created_at,omitempty" gorm:"column:created_at;type:datetime;comment:;"`
+	UpdatedAt *time.Time `form:"updated_at" json:"updated_at,omitempty" gorm:"column:updated_at;type:datetime;comment:;"`
+	IsUsed    bool       `form:"is_used" json:"is_used,omitempty" gorm:"column:is_used;type:tinyint(1);size:1;default:0;comment:是否已使用;"`
+}
+
+func (EmailCode) TableName() string {
+	return tablePrefix + "email_code"
+}
+
+// CreateEmailCode 创建EmailCode
+func (m *DBModel) CreateEmailCode(emailCode *EmailCode) (err error) {
+	err = m.db.Create(emailCode).Error
+	if err != nil {
+		m.logger.Error("CreateEmailCode", zap.Error(err))
+		return
+	}
+	return
+}
+
+// UpdateEmailCode 更新EmailCode，如果需要更新指定字段，则请指定updateFields参数
+func (m *DBModel) UpdateEmailCode(emailCode *EmailCode, updateFields ...string) (err error) {
+	db := m.db.Model(emailCode)
+	tableName := EmailCode{}.TableName()
+
+	updateFields = m.FilterValidFields(tableName, updateFields...)
+	if len(updateFields) > 0 { // 更新指定字段
+		db = db.Select(updateFields)
+	} else { // 更新全部字段，包括零值字段
+		db = db.Select(m.GetTableFields(tableName))
+	}
+
+	err = db.Where("id = ?", emailCode.Id).Updates(emailCode).Error
+	if err != nil {
+		m.logger.Error("UpdateEmailCode", zap.Error(err))
+	}
+	return
+}
+
+// GetEmailCode 根据id获取EmailCode
+func (m *DBModel) GetEmailCode(id int64, fields ...string) (emailCode EmailCode, err error) {
+	db := m.db
+
+	fields = m.FilterValidFields(EmailCode{}.TableName(), fields...)
+	if len(fields) > 0 {
+		db = db.Select(fields)
+	}
+
+	err = db.Where("id = ?", id).First(&emailCode).Error
+	return
+}
+
+type OptionGetEmailCodeList struct {
+	Page         int
+	Size         int
+	WithCount    bool                      // 是否返回总数
+	Ids          []int64                   // id列表
+	SelectFields []string                  // 查询字段
+	QueryRange   map[string][2]interface{} // map[field][]{min,max}
+	QueryIn      map[string][]interface{}  // map[field][]{value1,value2,...}
+	QueryLike    map[string][]interface{}  // map[field][]{value1,value2,...}
+	Sort         []string
+}
+
+// GetEmailCodeList 获取EmailCode列表
+func (m *DBModel) GetEmailCodeList(opt *OptionGetEmailCodeList) (emailCodeList []EmailCode, total int64, err error) {
+	tableName := EmailCode{}.TableName()
+	db := m.db.Model(&EmailCode{})
+	db = m.generateQueryRange(db, tableName, opt.QueryRange)
+	db = m.generateQueryIn(db, tableName, opt.QueryIn)
+	db = m.generateQueryLike(db, tableName, opt.QueryLike)
+
+	if len(opt.Ids) > 0 {
+		db = db.Where("id in (?)", opt.Ids)
+	}
+
+	if opt.WithCount {
+		err = db.Count(&total).Error
+		if err != nil {
+			m.logger.Error("GetEmailCodeList", zap.Error(err))
+			return
+		}
+	}
+
+	opt.SelectFields = m.FilterValidFields(tableName, opt.SelectFields...)
+	if len(opt.SelectFields) > 0 {
+		db = db.Select(opt.SelectFields)
+	}
+
+	db = m.generateQuerySort(db, tableName, opt.Sort)
+
+	db = db.Offset((opt.Page - 1) * opt.Size).Limit(opt.Size)
+
+	err = db.Find(&emailCodeList).Error
+	if err != nil && err != gorm.ErrRecordNotFound {
+		m.logger.Error("GetEmailCodeList", zap.Error(err))
+	}
+	return
+}
+
+// DeleteEmailCode 删除数据
+func (m *DBModel) DeleteEmailCode(ids []int64) (err error) {
+	err = m.db.Where("id in (?)", ids).Delete(&EmailCode{}).Error
+	if err != nil {
+		m.logger.Error("DeleteEmailCode", zap.Error(err))
+	}
+	return
+}
+
+// 获取最新一条邮箱验证码
+func (m *DBModel) GetLatestEmailCode(email string, codeType int32) (code EmailCode) {
+	err := m.db.Where("email = ? and code_type = ?", email, codeType).Order("id desc").Find(&code).Error
+	if err != nil {
+		m.logger.Error("GetLatestEmailCode", zap.Error(err))
+	}
+	return
+}
diff --git a/model/init.go b/model/init.go
index 552a8cf..cb1a4ab 100644
--- a/model/init.go
+++ b/model/init.go
@@ -175,6 +175,7 @@ func (m *DBModel) SyncDB() (err error) {
 		&Report{},
 		&Navigation{},
 		&Punishment{},
+		&EmailCode{},
 	}
 
 	m.alterTableBeforeSyncDB()
diff --git a/util/captcha/captcha.go b/util/captcha/captcha.go
index f766547..0d809c9 100644
--- a/util/captcha/captcha.go
+++ b/util/captcha/captcha.go
@@ -73,6 +73,6 @@ func GenerateCaptcha(captchaType string, length, width, height int) (id, b64s st
 }
 
 // VerifyCaptcha 验证验证码
-func VerifyCaptcha(id string, captchaValue string) (ok bool) {
-	return store.Verify(id, captchaValue, true)
+func VerifyCaptcha(id string, captchaValue string, clear bool) (ok bool) {
+	return store.Verify(id, captchaValue, clear)
 }