Author: Alan J. Flavell Date: To: Exim users list Subject: Re: [exim] Help with bounces to non-existing local users
On Sat, 19 Mar 2005, Walter H. van Holst wrote:
> Is there a way to reroute mail with an empty sender-address to
> non-existing local users to /dev/null?
What's wrong with the protocol-correct 5xx response at SMTP time?
> I am getting flooded with spam posing as bounces to non-existing
> local addresses.
So verify the recipient.
A properly-behaved MTA won't pester you further, since the envelope
sender is null. And at least it'll leave a genuine rejection entry in
their logs.
To silently accept and discard any kind of mail is no way to run a
reliable mail system. Just sometimes it might nevertheless be
justifiable, but only if all other approaches have failed.
