Just a question for all of you about quotas on cyrus imap.
As far as I see, there is no "grace" quota or warning system. Users not watching the size of their mailboxes won't know they're near full until they're actually full. Is this the case?
Check out quotawarn: and quotawarnkb: in man imapd.conf. They result in IMAP ALERT messages being generated.
Lets say a user has a 20 MB quota on their mailbox. Lets say it currently sits at 19 MB (usage). Then, assume postfix hands over a 1.5 MB email (uncommon, but if there are attachments...). Does Cyrus accept this message but no further emails, or does it flat-out deny it?
The former. Mail isn't rejected until the box is over quota.
If it does deny this 1.5 MB email, does it accept a 3k email from postfix that arrives moments later?
I assume once the quota has been exceeded, users won't be able to receive new email until they delete old ones. Is the quota restriction/ban "lifted" immediately after the offending user deletes enough of their emails?
Yep. It's also a non-fatal delivery failure, at least on my setup. So mail will continue to be retried until a hard fail, 5 days or so.
Most of my IMAP users (local subnet) will be using Mozilla Thunderbird. The remaining users will be mostly POP on Outlook (remote users).
POP is a problem because it doesn't provide any feedback like IMAP ALERT.
In addition to the IMAP ALERTs provided by the quotawarn settings, we do a weekly cron script that sends an email to users approaching quota.
-David
-- David R Bosso <[EMAIL PROTECTED]> Systems & Network Manager, Letters and Science IT UC Santa Barbara - 1054 North Hall 805 451-7160
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