qmail-clear-queue.md

check the current mail queue

/var/qmail/bin/qmail-qstat
messages in queue: 22463
messages in queue but not yet preprocessed: 22

stop the qmail service

service qmail stop

execute the following commands one by one

find /var/qmail/queue/mess -type f -exec rm {} \;
find /var/qmail/queue/info -type f -exec rm {} \;
find /var/qmail/queue/local -type f -exec rm {} \;
find /var/qmail/queue/intd -type f -exec rm {} \;
find /var/qmail/queue/todo -type f -exec rm {} \;
find /var/qmail/queue/remote -type f -exec rm {} \;

or

to delete only e-mails in queue with some text

grep -H -R /var/qmail/queue -e 'some-text' | cut -d: -f1 | xargs rm

start the qmail service.

service qmail start

check the mail queue

/var/qmail/bin/qmail-qstat
messages in queue: 0
messages in queue but not yet preprocessed: 0