Disk quotas don't include mail?

[kilburn]

It's not that disk quotas don't include e-mail, but that only FTP is really enforcing the quotas (try to upload something through ftp and you'll see).

The real problem here is that stock postfix doesn't support any kind of quota. Therefore, there are two options to enable quota support:

1. Install dovecot
2. Patch postfix with the VDA patch.

Both options have been discused before in this forum, so use google to find the howtos....