Hello everyone, I have been working to try and solve an issue with our mail server. our customers are recieving bounce back messages stating

----- The following addresses had permanent fatal errors ----- <example@unabletorecieve.com>



----- Transcript of session follows ----- ... while talking to mail1.example.com <<< 554 mail1.example.com ... connection error: connection reset by peer/timeout


I've done as much research as I can about this error, but nothing I can find even mentions the error we're recieving.
We looked up our web server IP, and it showed we were on a blacklist for Backscatterer.com, though our admin said that this shouldn't be something we have to worry about.

If anyone can provide any more insight to this issue I would greatly appriciate it. I will report here if we manage to solve the issue ourselves.

~Joshua Kahley