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Qmail queue is growing. How can I speed up process of sending mail?
Article ID: 1414
Last Review: Oct,6 2008
Author:
Last updated by: system
Resolution

Usually Qmail queue is growing due to too many messages in remote queue, because sending mail to remote servers takes
much more time than delivering the message to the local mailbox.

By default Qmail uses up to 20 ‘qmail-remote’ processes to deliver mail to remote servers. This value can be not enough
if the server has heavy mail traffic. In this case you can increase number of simultaneously running ‘qmail-remote’
processes by creating /var/qmail/control/concurrencyremote file with needed value, for example:

# echo 50 > /var/qmail/control/concurrencyremote

Then restart Qmail. See “man qmail-control” for more information. Also, see the articles about SPAM issue 766.
Keywords: big queue stuck mail slow delivery