EASY steve.h...@digitalcertainty.co.uk:
> Appreciate that - but to do this defeats the object of rejecting mail at
> SMTP time (to avoid the bounce in the first place). What appears to
> happening is the spambot sending the mail does not hang around for the
> 250 OK at the end of the <lf>.<lf>. If it did, it would have been SMTP
> rejected. (no bounce ever needed).
As delivered, Postfix does not send a bounce email message when it
can't give the bad news directly to the remote SMTP client.
If your Postfix does, then you have a non-obvious configuration,
and sharing that may help to un-confuse the discussion.
Wietse
