All,

I'm installing an Ubuntu spam-filter front-end for a customer's badly configured M$ Exchange email server. The Exchange server has all the user accounts in a non-canonical domain (domain.local) in Active Directory. Of course, Postfix receives and relays mail for domain.com, not domain.local.

Is it possible to tell Postfix to accept mail for domain.com, have it rewrite the destination from user@domain.com to user@domain.local, and then relay it to Exchange? The only alternative, it appears, is to export all the user data on the AD side, and create the properly named AD domain.

TIA,
doctorcisco

See if anything here does what you're after

http://www.postfix.org/ADDRESS_REWRITING_README.html

Thanks for the help, Billy. The correct way to do this:

In main.cf:

recipient_canonical_maps = hash:/etc/postfix/myrecipientmap

In myrecipientmap:

@mydomain.com @mydomain.local

Then postmap /etc/postfix/myrecipientmap
postfix reload

(To change inbound user@domain.com to user@mydomain.local).

Later,
doc

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