12/22/2025 6:00:46 PM - 
Message:	Mailbox unavailable. The server response was: relay not permitted, authentication required
StackTrace:	   at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception)
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   at Surveya_Service.Helper.SendMail(String to, String subject, String message, Boolean isHTML, String from, Attachment mailAttachment) in C:\Projects\Surveya\surveya_service_and_webapp\Surveya Service\Helper.cs:line 64