Some useful postfix commands

Intro

This is a partial list of useful commands related to postfix/sendmail for my own reference. It's posted here in case anyone else finds this useful, too.

Commands

• List stuff in the mail queue:
  mailq
  
  
• Read a message in the mail queue with example id 012345678F:
  postcat -q 012345678F
  
  
• Delete a message in the mail queue with example id 012345678F:
  postsuper -d 012345678F
  
  
• Delete ALL messages in the mail queue (warning - no confirmation nor undo!):
  postsuper -d ALL