Rejecting Invaliud Users - Useful Resource pointers?

11 msg	Reject unknown Sender address
10 msg	Postfix and archiving
5 msg	-o content_filter overrides main.cf ?
1 msg	Postfix 2.4.3 and 2.3.11 available
8 msg	SASL authentication via dovecot?
2 msg	postfix/sasl: sql_select option missing - wtf?
3 msg	max connection rate/count/limit issues.
1 msg	requeue mails
6 msg	nothing in maillog
9 msg	local and remote storage for same user

Rejecting Invaliud Users - Useful Resource poin...
\ Terry Allen (31 May 2007)
. \ mouss (31 May 2007)
. . \ John Beaver (31 May 2007)
. . . \ mouss (31 May 2007)
. . . \ Terry Allen (1 Jun 2007)
. \ Rod Dorman (1 Jun 2007)
. . \ mouss (1 Jun 2007)

4 msg	Distributing map files
5 msg	relay_recipient_maps for multiple destinations
13 msg	auto-responders with postfix
6 msg	Mydestination with virtual domains
6 msg	Splitting smtpd_proxy_filter in smtpd_recipient...
10 msg	Can't Send to Sprint Messaging Users..
1 msg	MAAWG meeting anyone?
2 msg	basic postfix 2.4.1 configuration for a simple ...
5 msg	Strange persistant 'timeout after DATA' from ma...

Subject:	Rejecting Invaliud Users - Useful Resource pointers?
Group:	Postfix-users
From:	Terry Allen
Date:	31 May 2007

Hi again,
Our server is set for all domains to reject invalid users & I
understand why rejecting non-existent users is correct - however, I
am trying to demonstrate to a client why they should set their
Exchange server up to reject non-existent users - can anyone point me
towards an easy to understand resource I can show this client why
they should reject non-existent addresses.
The reason they are accepting invalid addresses is in case
someone makes a mistake sending an email into the server - asking for
a spam problem in my opinion. Many thanks for any pointers.
--

Bye for now, Terry Allen
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