How to flush the queue of Postfix
Q. How can I send all emails in queue on Postfix from command line?
A. If you are using Postfix as your MTA on a Linux, Mac OS X or Unix server, and for some reason there are a lot emails on the queue, you can try to send all of them with:
That will try to send all emails stuck, if there is a problem, you can check the logs for the cause.
Once the problem is solved you can try
postfix -f again, and check the queue with: