Thanks for the replies, I do like the reject at the smtp level.


Kim

On 10/29/2014 04:12 PM, Alexandre Ellert wrote:

Le 29 oct. 2014 à 15:49, Noel Jones <njo...@megan.vbhcs.org <mailto:njo...@megan.vbhcs.org>> a écrit :

I assume you're talking about unidentified spam delivered to an
over-quota mailbox.  Intentionally bouncing spam, such as a with an
after-queue or delivery time spam filter, is a very bad idea and
will eventually get you blacklisted as a backscatter source.

A good solution is to enable Dovecot quota status service.
It provides information about quota to Postfix via policy protocol.
That way you can REJECT inbound mail at the smtp session level when quota is reached and avoid backscatter.

Check this doc for details : https://sys4.de/en/blog/2013/04/08/postfix-dovecot-mailbox-quota/


Alexandre

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