Flavio Stanchina wrote:
Martijn Lievaart wrote:
It's not just broken smtp clients. A rude socket teardown is rightly
interpreted by MTAs as a temporary error. So they try again [...]
Isn't there a way to return a permanent error in the middle of the
message? IIRC there isn't, but you certainly know SMTP stuff better
than I do.
No, unfortunately, there is not. The data fase of smtp has no way for
the receiver to stop the sender in midway. And yes, this causes exactly
the problem you are seeing.