fix(smtp): Check From Name in SMTP is not a Email

i18n/en_US.yaml

@@ -111,6 +111,9 @@ backend:
         other: "No permission to update."
       cannot_set_synonym_as_itself:
         other: "You cannot set the synonym of the current tag as itself."
+    smtp:
+      config_from_name_cannot_be_email:
+        other: "The From Name cannot be a email address."
     theme:
       not_found:
         other: "Theme not found."

internal/base/reason/reason.go

@@ -60,4 +60,5 @@ const (
 	UserCannotUpdateYourRole         = "error.user.cannot_update_your_role"
 	TagCannotSetSynonymAsItself      = "error.tag.cannot_set_synonym_as_itself"
 	NotAllowedRegistration           = "error.user.not_allowed_registration"
+	SMTPConfigFromNameCannotBeEmail  = "error.smtp.config_from_name_cannot_be_email"
 )

internal/schema/siteinfo_schema.go

@@ -3,10 +3,14 @@ package schema
 import (
 	"context"
 	"fmt"
+	"net/mail"
 	"net/url"
 
 	"github.com/answerdev/answer/internal/base/handler"
+	"github.com/answerdev/answer/internal/base/reason"
 	"github.com/answerdev/answer/internal/base/translator"
+	"github.com/answerdev/answer/internal/base/validator"
+	"github.com/segmentfault/pacman/errors"
 )
 
 const PermaLinkQuestionIDAndTitle = 1
@@ -190,6 +194,17 @@ type UpdateSMTPConfigReq struct {
 	TestEmailRecipient string `validate:"omitempty,email" json:"test_email_recipient"`
 }
 
+func (r *UpdateSMTPConfigReq) Check() (errField []*validator.FormErrorField, err error) {
+	_, err = mail.ParseAddress(r.FromName)
+	if err == nil {
+		return append(errField, &validator.FormErrorField{
+			ErrorField: "from_name",
+			ErrorMsg:   reason.SMTPConfigFromNameCannotBeEmail,
+		}), errors.BadRequest(reason.SMTPConfigFromNameCannotBeEmail)
+	}
+	return nil, nil
+}
+
 // GetSMTPConfigResp get smtp config response
 type GetSMTPConfigResp struct {
 	FromEmail          string `json:"from_email"`