Hello, I've got a strange problem with my MX server, that is not related to postfix: looks like neither Steam nor Binance can post email to me. I've had a discussion with Steam support, they said they have delivery failure on their side but couldn't provide more details than this:
Time Attempted: 2021-01-23 08:20:59 Address: *@patpro.net Remote MTA Status: 597 I see nothing in my postfix logs, I see nothing in my firewall logs. Inbound connections from Steam server is visible in my logs until the 22th of November 2020. Since then, nothing. I'm looking for a tool/service that would help me diagnose delivery problems to my server… Any hint appreciated. Thanks patpro
