Dnia 18.11.2025 o godz. 10:17:50 lejeczek via Postfix-users pisze: > Certainly no PTR record for my IP but - do ISPes even do that - for > us at home or in general customers anywhere, as opposed to > co-located/hosted stuff? (or registrars who can, who do reverse > too?) > I'm not going to move home there to such ISP's area, but sincere > question, just out of curiosity.
If you try to send mail directly from regular home/customer Internet connection, you may have bigger problems that improper FCrDNS. It is a common practice in mail servers setup to reject mails from such connections. It can be achieved either by querying a specific DNSBL that lists such IP address ranges - like Spamhaus's PBL - or just by checking for "generic" rDNS hostname format like "91-150-210-162.dynamic.play.pl", "public-gprs374250.centertel.pl" or similar (or by using both methods). As description for Spamhaus's PBL states, such IP addresses "should not be attempting to directly deliver unauthenticated SMTP email to any Internet mail server. All the email originated by an IP listed in PBL is expected to be submitted - using authentication - to a SMTP server which delivers it to destination." And this is a common consensus among people who are running mail servers - even totally private ones, like myself (I also use Spamhaus's PBL on my server to reject mail from regular customer IP addresses). So I think you really should get some cheap VPS to use it as a relay for your mail. -- Regards, Jaroslaw Rafa [email protected] -- "In a million years, when kids go to school, they're gonna know: once there was a Hushpuppy, and she lived with her daddy in the Bathtub." _______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
