Am 12.10.2012 13:55, schrieb /dev/rob0:
> I don't think open relay is likely to be the result, but again, 
> there's no reason why a relayhost should EVER be in $mynetworks

surely it is

* barracuda as MX
* postfix as mail-server
* check_recipient_access proxy:mysql:/etc/postfix/mysql-spamfilter.cf

EVERY message without SASL or from mynetworks
goes directly to the barracuda-spamfilter and
if it is OK it comes back

this prevents from spammers ignoring the MX and try
directly to spit their crap to "mail.thelounge.net"

not many, but hey - there has to be no single message
which did not went through spam/virus-filter




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