How do I check the mail queue
sendmail -bp
It will print a list of emails
Command of check the number of messages waiting to be sent on the server is:
/var/qmail/bin/qmail-qstat
How to force qmail to process all messages in queue immediately?
If you send ALRM signal to the qmail-send process, Qmail will try to process all messages in queue again immediately.
# ps ax | grep qmail-send
# kill -ALRM
