Question: I’m using Exim mail server under CentOS Linux. How do I remove all mail messages from the Exim mail queue Administration using a shell prompt (SSH)?
Answer: Exim is a mail transfer agent (MTA) used on Unix-like operating systems. It aims to be a general and flexible mailer with extensive facilities for checking incoming e-mail.
In this very small tutorial I will provide you a one line command that allows you to completely clear your Mail Queue Administration of directadmin. This is a list of mails which still has to be sent. The list has to be cleared once in a while since it can get really stuffed. I had about 110 pages of mails that still needed to be send and I think that a bit too much.
You just have to run the command below in SSH:
To remove all messages from the queue, enter:
# exim -bp | awk '/^ *[0-9]+[mhd]/{print "exim -Mrm " $3}' | sh
Dallas Marlow, suggested following clean command:
# exim -bp | exiqgrep -i | xargs exim -Mrm
Thanks to http://thegioinguonmo.com