Hello, long time (Courier user) listener, first time (Postfix user)
caller ...
I'm getting repeated spåms from Brazil and there is no un-sub link.
The sending SMTP servers are various hosts in the *.cnode.io domain,
with different subnets involved so trying to block them all is like
playing Whack-a-Mole™. They also like to change up the "From: "
address as well. It's a cat and mouse game and I'm losing.
So I tried to set up a "sender_access" file to block them but it's not
working:
--
[root@isolar postfix]# ls -lt sender_access*
-rw-r--r-- 1 root root 12288 Jul 13 01:54 sender_access.db
-rw-r--r-- 1 root root 609 Jul 13 01:53 sender_access
[root@isolar postfix]# grep -n sender_access master.cf
27: -o mua_sender_restrictions= permit_sasl_authenticated,
reject_unknown_reverse_client_hostname, reject_unknown_client_hostname,
reject_unknown_sender_domain, check_sender_access
hash:/etc/postfix/sender_access, reject
45: -o mua_sender_restrictions= permit_sasl_authenticated,
reject_unknown_reverse_client_hostname, reject_unknown_client_hostname,
reject_unknown_sender_domain, check_sender_access
hash:/etc/postfix/sender_access, reject
[root@isolar postfix]# cat sender_access
# ADDRESS PATTERNS # ACTION
pro...@magazineluiza.com 550 Blacklisted
sald...@magazineluiza.com 550 Blacklisted
magazineluiza.com 550 Blacklisted
personalizado*@ 550 Blacklisted
mag...@magazine-luiza.com.br 550 Blacklisted
magazine-luiza.com.br 550 Blacklisted
cnode.io REJECT
stretchoid.com REJECT
--
(I was hoping Postfix would reject any SMTP connections from *.cnode.io
and *.stretchoid.com with those last two lines.)
The headers on the latest one are
--
Received: from v150-95-110-163.a00d.g.han1.static.cnode.io
(v150-95-110-163.a00d.g.han1.static.cnode.io [150.95.110.163])
by isolar.DynDNS.ORG (Postfix) with ESMTP id 35492284CB6F
for <ea...@isolar.dyndns.org>; Wed, 28 Jul 2021 03:40:43 -0700 (PDT)
Received: by v150-95-110-163.a00d.g.han1.static.cnode.io (Postfix, from
userid 33)
id CA1E1D2BA3; Wed, 28 Jul 2021 17:18:00 +0700 (+07)
To: ea...@isolar.dyndns.org
Subject: Smart TV 60" 4K R$ 1.699,90 - Smart TV 55" 4k R$ 1.359,99 -
Smart TV 43" 4k R$ 1.099,00 Black Ofertas Magalu - Aproveite! - [
95271443633 ]
From: Ofertas Magazine Luiza-38 <personalizad...@magalu.com>
--
What am I doing wrong? ¯\_(ツ)_/¯
Thanks.
