Lorenzo Perone writes:
assumed cause. I'm now monitoring the mailq size via zabbix (as simple as mailq | wc -l ) and triggering alarms when it keeps growing too quickly. Do you think mailq output is a reliable indicator, or should
Yes, it's reliable.
we resort to maillog analysis for this, too? One reason why I ask is that I vaguely remember messages stuck in the mailq for months, allthough I haven't seen such ones in a while.
No, that shouldn't happen. All messages should have the same maximum expiration time.
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