The check was noisy, but it was producing useful graphs, and though I could have disabled the alerts, they were a handy reminder that “you should really look into fixing that when you get the chance”. And so they stayed… for 3 months.

This story begins from me wanting to be a good little sysadmin and make sure all our services are properly monitored…

As I am not a normal person, I run my own mail servers. These servers handle email for a couple of domains and are used by myself and a couple of family members. Here’s a look into an investigation of an unusual mail delivery problem.