There was some networking work performed that broke my outbound email flow due
to an unexpected IP address change. Email queued up during the equipment
install as expected with dsn=4.7.5 or dsn=4.0.0 codes. Two days later one of
our external vendors returned a dsn=5.7.1 which caused Postfix to
I have been cutoff from the Postfix web site due to it apparently being a TOR
exit node in Germany. The upstream boffins in the organization say that our
organization gets hammered by TOR exit nodes by attacks so they block all TOR
exit nodes due to the malicious nature of said nodes.
I though
