NDR strategy

[Jan-Peter Koopmann]

> I suspect this is done by doing an LDAP lookup.

Correct which is why we are not using it. I would like to have my
Exim/Sendmail only talk to Exchange via SMTP. Therefore we push this
information towards Exim. We wrote a little script that exports all
valid e-mail adresses to the unix box, convert this to a cdb and have
exim look this up. Works automatically and flawlessly.

Regards,
 JP