Question: what about plussed users?

[Tanel Kokk]

We are implementing somekind of better bounce management of e-mail 
announces in our company. The first one what came up on my mind was so 
called "plussed users" feature, eg.
	Return-Path: [EMAIL PROTECTED]
So it is simple to process bounced e-mails by adding a line to 
sendmail/postfix aliases-file like that:

info+*:         /some/file
or even
info+*:         |/some/script.sh
Now my question. What may think anti-spam software creators/programmers 
about plussed users? How most of anti-spam softwares/plugins think of 
this kind of senders, probably spam? What is the "legal and proper way" 
to manage large scales of bounces?

Tanel Kokk
and we are not spammers ;)