Postfix is an open-source mail switch agent (MTA) that routes and delivers email correspondence. The Postfix queue is a short lived storage space for e mail messages which are ready to be delivered. Checking the Postfix queue will be helpful for troubleshooting e mail supply points.
There are a number of other ways to verify the Postfix queue. A method is to make use of the `postqueue` command. The `postqueue` command will show an inventory of all of the messages within the queue, together with their standing. One other strategy to verify the Postfix queue is to make use of the `mailq` command. The `mailq` command will show an inventory of all of the messages within the queue, together with their measurement and age.
