Dnia 13.01.2020 o godz. 15:50:59 Gerben Wierda pisze: > Some ISP’s even go further my catching all traffic to port 25 to any > system outsuide their network (other than to their own MTAs) blocking it > or directing that to their own MTA. That is because of course one hacked > system in their network means an open relay from their network and that is > bad for the reputation of the network. So, they may force all clients to > go to their relay. I guess not many ISPs still do this anymore, though > some may still block port 25 to anywhere but their own mail relay.
I once found an ISP that blocked port 25 completely, even not allowing to connect to their mail relay (actually, they didn't provide any mail relay at all to their users, so there was nowhere to connect to). You were forced to use ports 587 or 465 for outgoing mail. -- 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."
