We don't do port shaping.
But certain protocols pass through different engines and these could cause delays. In this case the in-line virus scanners on port-25, in this specific area, had high utilisation and it caused the problems seen.
threegee, won't you test again?
Just tested now on port 25 to my server .... no go. With or without TLS/SSL it is still a no go. "None of the authentication methods supported by your client are supported by this server" ... I won't bother testing the other 5 servers because I know what the outcome is going to be.
Last edited: