On 2025-03-06 at 04:56:03 UTC-0500 (Thu, 6 Mar 2025 10:56:03 +0100)
Petko Manolov via Postfix-users <pet...@nucleusys.com>
is rumored to have said:
On 25-03-06 10:38:54, Danjel Jungersen via Postfix-users wrote:
On 06-03-2025 09:28, Petko Manolov via Postfix-users wrote:
Hmm, zen.spamhaus.org doesn't resolve anymore. I wonder what would
be the
correct/contemporary version of:
reject_rbl_client zen.spamhaus.org=127.0.0.[2..11]
Mine also stopped working some time ago, resolved by setting up my
own
recursive resolver and creating a free account. The domianname used
for
looking up is changed to <some_personal_code>.zen.dq.spamhaus.net
This render useless about 95% of all main.cf examples that can be
found on the
net ... :)
A very large fraction of sites do not have the volume or network
neighborhood to get Spamhaus to require a key. They've been doing it in
varied ways for a very long time, the recent tightening (particularly
regarding Hetzner) just hits a larger set of sites.
I use it through rspamd, but guess that it is the same issue.
I'm actively trying to avoid using spam daemons of any sort. If i
find my
current setup ineffective, next i'll try fail2ban and/or postscreen
combination.
Fail2ban is a poor fit by itself for spam control, as it is useless
against the worst sources (commodity mailbox providers) who emit a mix
of ham and spam, nearly all of it properly authenticated. At best, it
reduces return visit log noise from repeat visitors who behave badly
enough to cause it. Postscreen using only the pre-greeting tests is
flawless at catching compromised spambots.
Using content analysis tools like rspamd or SpamAssassin is required for
high-accuracy spam filtering in the modern world. I wish it were not so.
E-mail is such a pain in the ass these days... :)
Amen...
--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo@toad.social and many *@billmail.scconsult.com
addresses)
Not Currently Available For Hire
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