On 09.01.20 17:09, Matus UHLAR - fantomas wrote:
on a few mail servers/gateways, we receive mail from domains that are
unreachable for mail delivery on a long-term basis.
besides spammers, there are companies that send mail from domains which
don't have MX records, and A records point to servers without mail service
running.
I would like to detect this kind of domains and block them.
Ideally, not immediately, but when e.g. domain is inaccessible for a given
time, e.g. when mail starts being returned.
Is something similar possible now?
I was thinking about something very similar that address verification does:
- applied on domains, not individual addresses
- applied softly, without explicit verification checks
This would require database of mail domains, and if mail to any domain is
unreachable for interval longer than maximal_queue_lifetime, mail for/from
that domain would get rejected and or deferred.
Until then, mail would be accepted as reachable.
Any idea if this could be implemented?
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Microsoft dick is soft to do no harm
