[Mimedefang] filter_recipient questions

[Damrose, Mark]

> -----Original Message-----
> From:  Jeff Rife
> 
> On 28 Apr 2006 at 9:18, Matthew.van.Eerde at hbinc.com wrote:

> > Export the list of valid email addresses from your destination MTA 
> > periodically, build an access map, and sendmail takes care of 
> > rejecting invalid recipients before MIMEDefang is called.

> Actually, no it doesn't.  
> Sendmail doesn't do any more checking to see if the address 
> is valid.  

That's true - unless you explicitly list every valid address in an
access map, and reject everything else.  Which is exactly what was
suggested above.

Yes, you need to export that list from the destination server whenever
it changes.  Matthew gave a link to a script to use LDAP to pull the
list from an Exchange server.  Wiki entries for scripts to pull out
of different backend servers would we welcome.