[At-Large] Fwd: [technical-issues] Banning .xyz email from my company's servers

[Michele Neylon - Blacknight]

Olivier

If you’re using Postfix I’d recommend setting up Postgrey
(see my rather old howto here: http://www.michele.me/blog/archives/2005/10/postgrey-greylisting-in-postfix-on-ubuntu-debian/ )

Spam Assassin by itself will only score mails.
For outright rejection you can plugin a few DNSBLs directly into Postfix and watch a lot of junk simply vanish completely ..

Regards

Michele
 
--
Mr Michele Neylon
Blacknight Solutions
Hosting, Colocation & Domains
http://www.blacknight.host/
http://blog.blacknight.com/
http://ceo.hosting/
Intl. +353 (0) 59  9183072
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-------------------------------
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On 17/03/2016, 04:31, "at-large-bounces at atlarge-lists.icann.org on behalf of Olivier MJ Crepin-Leblond" <at-large-bounces at atlarge-lists.icann.org on behalf of ocl at gih.com> wrote:

>Dear Barry,
>
>thanks for your follow-up on this. That's a good idea too. I've checked
>the past messages in the queue and spamassassin scores range from 3.4 to
>4.9 (with a trigger score required of 5.2). However, can you get a
>rejection message sent to the originator of the message? When blocking
>at Postfix level, the message is not accepted in the system & a bounce
>is issued. A genuine email originator would get a bounce explaining the
>bounce and try another method to get in contact. With spamassassin the
>message would just get dropped, wouldn't it? (apologies, my spamassassin
>coding is a bit crusty)
>Kindest regards,
>
>Olivier
>
>On 17/03/2016 05:32, bzs at theworld.com wrote:
>> [is this OT, how did this start?]
>>
>> I use spamassassin system-wide to increase the spam score of a message
>> from certain TLDs to near the threshold where it's just rejected.
>>
>> So for example in local.cf I add a rule like:
>>
>> header DOTTOP_RULE              From =~ /.*\.top/i
>> describe DOTTOP_RULE            BZS 20160226
>> score DOTTOP_RULE               2.5
>>
>> which means just having a .TOP TLD in the From gives it a base score
>> of 2.5, so it wouldn't take much more, tripping some other
>> spamassassin rules, to just get it blocked entirely.
>>
>> But it means in theory a very non-spammy msg from that TLD might still
>> get through.
>>
>
>-- 
>Olivier MJ Crépin-Leblond, PhD
>http://www.gih.com/ocl.html
>
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