checkmailquota - script to alert POP/IMAP users near quota

After very nearly losing a key customer who lost a lot of important mail when his POP account went over quota, I've been looking for something that would send email alerts to POP account holders when their mailboxes are near quota, and summaries of accounts near quota to the hostmaster. Didn't find anything that seemed to do the job neatly, so wrote a shell script for cPanel systems, available here:

http://hosting.birdhouse.org/scripts/checkmailquota.txt

checkmailquota loops through the home dirs and, for each home, loops through hosted domains. For each domain, loops through mailboxes, recording byte sizes. Compares these sizes to what's listed in the quota file for that mailbox. If usage is within xx% of quota, sends a warning message to that mailbox. At end of script, sends a summary of accounts near quota to postmaster.

When I switched to cPanel, I did so because I was getting tired of writing stuff like this all the time. cPanel has seemed pretty complete, but it seems bizarre to me that a script like this, or equivalent functionality, isn't built into the system (at version 10 no less!) Weird. Anyway, hope someone finds this useful.

If you make modifications or have suggestions, please send them on.

 

This script has been revved to v 1.2, and now works on cPanel systems with boxtrapper installed. Also now handles cases where users have deleted their quota files.

 

Odd - I have that enabled, have always had it enabled. But neither I nor my customers have ever received autogenerated email quota notifications. So it works on your cPanel systems?

Well, I like the configurability of my script:

- Ability to alter the message text
- Ability to modify layout of the summary message
- Ability to turn/off notifications to POP owners or hostmaster separately
- Ability to customize the checking schedule via crontab

 

v 1.3 adds a mailbox count as an FYI, so you know roughly how many mailboxes are handled by your server.

 

v 1.4 only sends warning messages to users if mail quota usage is over specified threshold but also under 100% -- no point in sending to over-quota accounts since user won't receive them, and the bounces will just be returned to root anyway.

Glad to hear people are finding this useful, thanks.

If you want to vote on it, this is bug #3306 in bugzilla:
http://bugzilla.cpanel.net/show_bug.cgi?id=3306