Dnia 3.12.2021 o godz. 09:14:23 Fourhundred Thecat pisze: > Hello, > > I have strict helo checks: > > smtpd_helo_required = yes > smtpd_helo_restrictions = reject_non_fqdn_helo_hostname, > reject_invalid_helo_hostname, > reject_unknown_helo_hostname > > now I have noticed mails being rejected: > > Helo command rejected: Host not found > > warning: hostname mail-eopbgr80085.outbound.protection.outlook.com > does not resolve to address 40.107.8.85: Name or service not known
reject_unknown_helo_hostname is known to produce quite a lot of false positives, and it is not recommended to use this restriction. -- Regards, Jaroslaw Rafa r...@rafa.eu.org -- "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."
