chore: add anti spamming and headers to email send

src/modules/users/services/users.service.ts

@@ -99,6 +99,7 @@ export class UsersService {
 
     const emailAddress = `${username}@${domain.name}`;
     const finalUserName = `${username}-${domain.name}`;
+    const finalDisplayName = `${username}`;
 
     const existingUser = await this.userRepository.findOne({ emailAddress });
     if (existingUser) throw new BadRequestException(UserMessage.EMAIL_ADDRESS_ALREADY_EXISTS);
@@ -131,7 +132,7 @@ export class UsersService {
         emailEnabled: true,
         emailQuota: userQuota,
         wildduckUserId: mailServerUser.id,
-        displayName: displayName || username,
+        displayName: finalDisplayName || displayName || username,
         isActive: true,
         business,
         domain,