No, it is NOT a blocked port. That would have been giving a different error message.
The fact that it said "Relay Blocked - Unauthorized" indicates that my mail server was able to get through to their mail server (the port was not blocked) and their mail server responded with "f**k off".
They are well aware of what ports are used and that business customers may wish them to be un-blocked, because there is a specific page on their user portal for turning port blocking on or off.
The consequences for business users running their own SMTP servers -- I don't know if they were ignorant of that or if they simply don't give a damn. It doesn't matter which it is, because either of those reasons makes them someone I no longer wish to do business with. But I need to investigate who to move to and how, before I can change ISPs.
no subject
No, it is NOT a blocked port. That would have been giving a different error message. The fact that it said "Relay Blocked - Unauthorized" indicates that my mail server was able to get through to their mail server (the port was not blocked) and their mail server responded with "f**k off".
They are well aware of what ports are used and that business customers may wish them to be un-blocked, because there is a specific page on their user portal for turning port blocking on or off.
The consequences for business users running their own SMTP servers -- I don't know if they were ignorant of that or if they simply don't give a damn. It doesn't matter which it is, because either of those reasons makes them someone I no longer wish to do business with. But I need to investigate who to move to and how, before I can change ISPs.