qmail

qmHandle
qmqtool
Qmail-Remove
qfixpermissions
qfixq
Queue Management for Qmail

• Qmail Core
  When updating the Qmail core, say to apply a new version of John Simpson's Combined Patch, be sure to stop all the Qmail services, including SMTP servers, before running make setup check. Otherwise, you'll run into errors as it tries to replace programs that are currently running.
• vpopmail

Tap control file
Any taps should go into /var/qmail/control/taps
"Tap" an individual address

Tap an entire domain

/var/qmail/bin/maildir2mbox

Nagios has many useful plugins for monitoring this qmail server.

Prerequisites for Monitoring With Nagios
These instructions assume that you have a Nagios server already set up similar to the instructions on this site.

dnscache
Change the IP address in /service/dnscache/env/IP, then restart the service (svc -t /service/dnscache).

SMTP
The run scripts for your SMTP service(s) need to be modified to reflect the new IP address you want them to listen on. Depending on which services you've enabled, you might need to edit:

Webmail
The IMAP server setting in your webmail configuration will need to be updated.

To mirror the entire /home/vpopmail structure, on the destination server:

To mirror just a domain, on the destination server::

Instructions for setting up public keys so rsync won't require a password.

Automate using cron

Maintenance tips for keeping your mail server running.

The original plugin is from http://www.openfusion.com.au/labs/nagios/
Download the check plugin:

The check command takes the syntax of check_qmailq -w count -c count [-W pre_count] [-C pre_count] [-q /path/to/qmail-qstat]. The warning and critical message counts can be adjusted to your preference. Edit /usr/local/nagios/etc/nrpe.cfg and add entries for the services you want to check, such as: