On 06.11.20 11:10, Rafael Azevedo wrote:
How can smtpd_sender_login_maps fix this issue?
As far as I know, this is only a shortcut for authentication.
ie: login as "raffus" will translate the user to "raf...@mydomain.com".
Am I missing something here?
no, I was:
after that you can use directives like:
reject_sender_login_mismatch
reject_known_sender_login_mismatch
reject_unauthenticated_sender_login_mismatch
in smtpd_sender_restrictions, which should do what you want.
Em sex., 6 de nov. de 2020 às 10:42, Matus UHLAR - fantomas <
uh...@fantomas.sk> escreveu:
On 06.11.20 09:48, Rafael Azevedo wrote:
>This is an old issue and I believe it has already focused on older
>discussions.
>
>I'm receiving SPAM from my own address.
>
>Checking server logs, user is not authenticating and the only way this
>spammer can play a trick is by sending an email to its own address (ie:
>from raf...@mydomain.com to raf...@mydomain.com).
>
>Is there a way to avoid this practice ?
on your server: use smtpd_sender_login_maps
on other servers: implement SPF,DKIM and DMARC for your domain.
note that some servers don't enforce DMARC, so mail from your address
may still appear on the internet.
--
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.
Chernobyl was an Windows 95 beta test site.
