Hi Matus, Thanks for the reply. 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? Thanks once again. 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. > "One World. One Web. One Program." - Microsoft promotional advertisement > "Ein Volk, ein Reich, ein Fuhrer!" - Adolf Hitler >
