mail for nonexistent user: wrong bounce?

[Franky Van Liedekerke]

Hi,

I've setup qmail 1.03 with the anti UCE path from Sam, but I'm seeing
some strange things:

when somebody from the external word sends a mail to a nonexistent user,

he gets a mail back
with failure notice etc, but in the notice it isn't said why it failed.
But I can see the reason in the logfiles. Does this have something todo
with the remote client or remote mailserver?
When I try the same, it's ok for my hotmail account, and I see the
failure reason.

Franky