Werk #22004: Show sendmail output when mail delivery fails
| Component | Notifications | ||
| Title | Show sendmail output when mail delivery fails | ||
| Date | Jul 21, 2026 | ||
| Level | Trivial Change | ||
| Class | Bug Fix | ||
| Compatibility | Compatible - no manual interaction needed | ||
| Checkmk versions & editions |
|
Previously, when sending an email through the local sendmail command failed,
Checkmk only reported the process exit code, for example:
sendmail returned with exit code: 1
That left you guessing about the actual cause of the failure.
Checkmk now captures the standard error and standard output of the sendmail
command and appends them to the error message. The reason reported by
sendmail itself is now part of the message, which makes diagnosing failed
mail deliveries much easier.