Qmail tips and tricks

Published on Author gryzli

Qmail – Speedup sending of outgoing mails by rising concurrencyremote

If your qmail queu length keeps growing when sending lots of emails, maybe your concurrent outgoing connections are not enough. So you could rise the limit to a value which will be sufficient.

The default value is “20” concurrent remote connections.

For this purpose execute the following:

echo 100 > /var/qmail/control/concurrencyremote

This will rise the limit to 100 concurrent connection.


Qmail – Change the time email messages can stay at qmail queue

By default Qmail has very long message queue timeout, and messages can stay up to 1 week in the queue.

If you want to shorten the time qmail queue messages can stay in Queue, then you can shorten

queuelifetime,  by using the following command:

echo "86400" > /var/qmail/control/queuelifetime

Then restart  Qmail

/var/qmail/bin/qmailctl restart