Check manual page of nullmailer_mailq

Nullmailer: Mailqueue Length

Distribution Official part of Checkmk
License GPLv2
Supported Agents Linux
This check monitors the number of deferred mails in the outgoing mail queue, as sent by the linux agent of Checkmk. Depending on the version of the Checkmk agent the number of mails in the failed queue is monitored as well.

This check creates one service per host which represents the state of the outgoing mailqueue.

The check will result in WARNING or CRITICAL if the number of mails in the deferred queue have reached the defined thresholds. By default the check will result in CRITICAL if there is at least one failed mail.


One service is created on each system which provides the {nullmailer-send} command.