Dnia 19.04.2024 o godz. 10:47:56 Sebastian Arcus via mailop pisze: > In a sense I haven't managed to make further progress with this. > Spamhaus have been very vague about the problem - which to some > extent I understand as they don't want the bad guys to exploit their > systems. But at the same time, their latest correspondence keeps on > dropping hints about port 25 - which doesn't make any sense, as port > 25 outbound has always been blocked on this network - so in that > case the blacklisting should have never happened. I've just tested > yesterday again - and not only I can't do outbound port 25 > connections from inside the network, I am getting, as expected, > automatic warnings from the server when the attempts happen - which > I configured a long time ago.
This reminds me of an issue I had about a year ago with one of the members of the Postfix mailing list. I wanted to reply to him directly and it turned out my server got firewalled on his server, apparently - as his logs did show - for some strange (non-SMTP) traffic coming from my server. I started to monitor all outgoing traffic from my server towards his IP address with tcpdump, then I put up firewall rules that blocked (with logging) all outgoing traffic to his IP other than to port 25. Obviously no packets were going out of my server towards his, yet the guy insisted that strange traffic from my address is still incoming. Indeed, his firewall kept blocking me and he kept unblocking me manually :). I was never able to find out what was going on. -- 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." _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
