Diego Liziero:
> Yes, definitely.
>
> > Postfix reports a broken connection as coming from "localhost" only
> > when the kernel reports an errno of ENOTSOCK.
>
> Forgive me if I'm asking something you might have already answered,
> is it easy to change the wrong error message for this case to
> something that could point the user to the fact that the socket
> disappeared before postfix could serve it?
By definition, a non-error result from accept(2) is a socket.
Reporting ENOTSOCK on such sockets is a kernel bug.
Postfix receives legitimate mail submissions via non-socket
inputs, and those submissions must not be reported as coming from
"unknown".
Wietse
