From: Magnus Bäck (magnusdsek.lth.se)
Date: Tue Mar 06 2007 - 13:51:24 CST

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On Tuesday, March 06, 2007 at 14:03 CET,
     Alexandre Chapellon <a.chapellonequipe.cyberscope.fr> wrote:

> I have a working setup of postfix with virtual domains and domain alias.
> Until now everything was stored in flat files (hash lookups) and I
> recently moved to an LDAP backend where I store my virtual domains,
> mailboxes and local aliases. I would like use LDAP for domains aliases
> too, meaning that every existing address in a "main" domain (eg:
> user1domain.com <mailto:user1domain.com>) should be redirected to the
> same localpart in the alias domain (eg user1domain.net
> <mailto:user1domain.net>).
> With Flat files I acheived this behaviour by using
> "virtual_alias_domains = hash:/myfile/with/alias_maps"
>
> and /myfile/with/alias_maps was something like:
> domain.com domain.net

You must not do that. It breaks recipient validation and makes you a
backscatter source.

> Does anybody knows how to make it work with LDAP (or even mysql would
> maybe help me)

The answer depends on your schema. The lookup keys Postfix uses and the
answer it expects are the same no matter what type of lookup table you
have.

--
Magnus Bäck
magnusdsek.lth.se

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