Relay Issues

Possible Cause:

  1. The SMTP server does not allow relaying unless you are sending email from a trusted IP or use proper authentication.
  2. Microsoft Exchange server: server is setup to block SMTP relaying.
  3. Some servers allow you to send email in

Required Authentication with wrong credentials


This occurs if the credentials provided in the Required authentication is wrong.

Error trace in logs:

Caused by: javax.mail.AuthenticationFailedException

at javax.mail.Service.connect(
at javax.mail.…

Email Send Notification failed

Error trace in logs:

Exception while trying to send notification for Request ID: 6|com.adventnet.servicedesk.ServiceDeskException: Mail sending failed.

javax.mail.MessagingException: Unknown SMTP host:;