I don't reject invalid HELO's or invalid rDNS and get very Little
spam, because I just ban all those shitty TLDs.
I have found out that most spam uses those new shitty TLDs so just
banning these shitty TLDs in the MIME from and MAIL from is a good
solution:
MAIL from stage:
deny
message = Banned TLD
sender_domains =
^(?i).*\\.(study|reise|technology|club|fun|bid|store|top|xyz|pro|date|faith|stream|host|loan|download|click|link|science|design|gdn|men|win|party|webcam|rocks|email|life|ninja|online|racing|review|site|trade|vividal|website|works|work|cricket|help|camera|computer|space|uno|tech|news|space|guru|berlin|photography|global|today|solutions|media|world|university|shop)\$
then one for Mime from stage:
deny
message = Banned TLD in MIME From ($h_from:)
condition = ${if match
{$h_from:}{^(?i).*\\.(study|reise|technology|club|fun|bid|store|top|xyz|pro|date|faith|stream|host|loan|download|click|link|science|design|gdn|men|win|party|webcam|rocks|email|life|ninja|online|racing|review|site|trade|vividal|website|works|work|cricket|help|camera|computer|space|uno|tech|news|space|guru|berlin|photography|global|today|solutions|media|world|university|shop)>\$}{yes}{no}}
That solves most current spam problems.
2018-05-26 23:24 GMT+02:00 Always Learning via Exim-users <exim-users@???>:
>
> On Sat, 2018-05-26 at 09:03 +0200, Luca Bertoncello wrote:
>
>> Well, unfortunately this address catches many Spam/junk E-Mails and, of
>> course, my Exim (4.88) tries to forward them.
>> Virus are blocked and will __NOT__ be forwarded, but Spam is some other and,
>> of course, I cannot be sure if an E-Mail is Spam or not, so I have to forward
>> it...
>
> I disagree, based on my 9? years of happy, contented and grateful usage
> of Exim.
>
> If you reject emails from MTAs having no rDNS or no resolving HELO (or
> EHLO) names or having a HELO name that is different from the sending
> MTA's host name, most of your spam will not reach your users.
>
> I then take additional Exim-based spam-repulsion activities and only get
> ONE spam perhaps every few weeks, despite having 5 incoming MTAs in 3
> countries.
>
> Do not do nothing and let yourself become a willing victim of spam.
>
>
> --
> Kind regard,
>
> Paul.
> England, EU. England's place is in the European Union.
>
>
> --
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