Patrick Ben Koetter:
> * Simon Croome <scro...@solent.ac.uk>:
> > On 05/05/2010 17:42, Victor Duchovni wrote:
> Here's the easier version...
> 
> Take a look at the "TABLE SEARCH ORDER" in man 5 transport. Here's an example:
> 
> # main.cf
> transport_maps = hash:/etc/postfix/transports
> 
> # /etc/postfix/transports
> firstname.lastn...@example.com          relay:lotus.notes.server:25
> firstname1.lastna...@example.com        relay:lotus.notes.server:25
> firstname2.lastna...@example.com        relay:lotus.notes.server:25
> example.com                             relay:ocs.server:25

If you take the transport_maps solution, then you need to set up
a relay-recipient_maps table with the addresses of valid recipients,
as documented in

http://www.postfix.org/STANDARD_CONFIGURATION_README.html#firewall

If you believe that Sendmail was able to guess the addresses of
your local users, then I can assure you that it can't.

More likely, Sendmail was accepting all kinds of garbage from the
Internet, and your Sendmail queue was full of MAILER-DAEMON messages
all around the clock.

We cannot make that same mistake with Postfix (if we did then you
might just as well have stayed with Sendmail).

        Wietse

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