Exim mail commands, frozen emails

To know the number of frozen mails in the mail queue, you can use the following command

#exim -bpr | grep frozen | wc -l

In order to remove all frozen mails from the Exim mail  queue, use the following command

#exim -bpr | grep frozen | awk {'print $3'} | xargs exim -Mrm

You can also use the command given below to delete all frozen mails

#exiqgrep -z -i | xargs exim -Mrm

If you want to only delete frozen messages older than a day, you can try the following

#exiqgrep -zi -o 86400

where you can change the value 86400 depending on the time frame you want to keep (1 day = 86400 seconds).