On 22.2.2011, at 23.28, Nikolaos Milas wrote:

> Feb 22 23:02:35 vmail dovecot: POP3(tester): Quota rule: root=User quota 
> mailbox=* bytes=102400 messages=0

Looks right.

> No warning mail was sent, at any point, even when the last mail was received, 
> which exceeded the quota.

That log was from pop3, not from mail delivery.. It's too late by then to give 
any kind of warnings.

> Could this behavior be related to the MTA? Must we also configure quotas in 
> Postfix (with VDA) for things to run correctly? (Note that I am forced to set 
> (in Postfix) virtual_mailbox_limit = 0, because the max acceptable value of 
> this parameter is 2G and in Dovecot I define mailbox limits of 4G. I haven't 
> yet set any VDA parameters.)

Postfix completely ignores quotas limits, warnings and everything else you've 
set in Dovecot! You need to be using Dovecot LDA. http://wiki.dovecot.org/LDA

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