Had a small issue with a web server sending out email recently. Thanks to some poorly secured WP sites and asshat script kiddies one of our servers turned into a spammer. Well, briefly because we quickly hit our cap on emails over at the kind people at Sendgrid. Even though we hit our cap on Sendgrid the server's queue was still filling up and the moment our cap was reset, all these additional backed up emails would start flooding through. Wonderful endless cycle. So, I stopped postfilx, found their littls scripts, and proceeded with the commands below to get things under control.
Anyhow, found myself needing some simple Postfix commands and its not every day I do mail administration so, here I am taking some notes on those.
View the mail queue:
Remove all mail from the queue:
postsuper -d ALL
Remove all main in the deferred queue:
postsuper -d ALL deferred
If I find myself using some other useful commands I'll update as I go.