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When running the alert email debug, the SMTP server may respond with a 530 error code.
diagnose debug reset
diagnose debug enable
diagnose debug console timestamp enable
diagnose debug application alertmail -1
Sample debug output that reflects the SMTP server response during the time of the issue.
2024-11-25 13:13:00 session: 0x99fb790, rsp_state: ehlo, code: 250
2024-11-25 13:13:00 session: 0x99fb790, rsp_state: auth, code: 334
2024-11-25 13:13:08 session: 0x99fb790, rsp_state: auth2, code: 535
2024-11-25 13:13:08 session: 0x99fb790, rsp_state: auth, code: 334
2024-11-25 13:13:08 session: 0x99fb790, rsp_state: auth2, code: 334
2024-11-25 13:13:14 session: 0x99fb790, rsp_state: auth2, code: 535
2024-11-25 13:13:19 session: 0x99fb790, rsp_state: mail, code: 530 <----- Server responded with 530 error code.
2024-11-25 13:13:19 _session_on_destroy
2024-11-25 13:13:19 <== send mail failed, m = 0x99beba0 s = 0x99fb790 <----- Email delivery failed.
To fix this issue:
- Make sure that the authentication/credential configured under the email setting is correct.
- The source IP address used by FortiGate to send the email is not included on the SMTP server blocklist.
Related articles:
Troubleshooting Tip: Email alert
Troubleshooting Tip: Alertmail queries
Technical Tip: Send mail failed due to ‘buffer is full’ when trying to authenticate FortiToken Mobil...
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