Troubleshooting SMTP

This section includes the solutions for the most common issues encountered while connecting to an SMTP server. Listed below are some of the errors to help understand why you are unable to send emails and troubleshoot the same.

Error: SMTP: Service Not Reachable

Cause: This error is notified when an SMTP server host is not reachable from DNIF.

Solution: Check connectivity with the SMTP server.

Error: SMTP: TLS Connection Failure

Cause: This error indicates that DNIF is unable to establish a TLS connection with SMTP server for TLS enabled SMTP servers.

Solution: Verify TLS is enabled on SMTP server.

Error: SMTP: Connection Failure

Cause: This error signifies that DNIF is unable to establish a connection with the SMTP server.

Solution: Check connectivity with SMTP server from the system hosting Console and Core.

Error: SMTP: Credential Error

Cause: This error indicates that the SMTP Server credentials used to login are not authenticated.

Solution: Verify the SMTP Server credentials used to login are correct.

Error: SMTP: Mail Delivery Failure

Cause: This error indicates that there was a failure in sending mail from DNIF to a specific mail server.

Solution: Verify the mail delivery address.