From: Alex Satrapa (alex.satrapaapf.edu.au)
Date: Wed Mar 29 2006 - 21:48:46 CST

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On 30 Mar 2006, at 13:47, Francois Saidi wrote:

> some system users (mail, info,...) receives mail from outside...
> how can i block all mail for non real users?

I wonder if this is an appropriate situation to use
check_recipient_access?

You could put REJECT values in for the reserved accounts, with DUNNO
for the whole domain, leaving the remainder of the checks to other
rules:

/etc/postfix/main.cf:
> smtpd_recipient_restrictions =
> ...
> check_client_access hash:/etc/postfix/bad_recipients
> ...

/etc/postfix/bad_recipients:
> mail REJECT
> info REJECT
> disk REJECT
> cron REJECT
> mydomain DUNNO

then the usual invocation of "postmap /etc/postfix/bad_recipients" to
create the bad_recipients.db file which is what the smtpd will
actually refer to.

Though I haven't tried this myself, so I don't know that this will work.

Alex

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