Need help for a migration

[Dan White]

Patrice OLIVER wrote:
> Hello,
> 
> I'm responsible of the migration from a windows platform to a linux 
> platform.
> On the linux platform, I use Postfix/Cyrus and openLdap.
> In postfix, file main.cf, mail_transport = cyrus
> I also tried to use luser_relay = $user at old_platform_ip to forward mail 
> for non existing local mailbox to the old server.
> 
> The problem is that is does not work. I receive a non delivering mail.
> 
> I read on the web that it's possible to access from any server to a 
> mailbox stored on another server. How can I do that ?

Patrice,

You should be able to do something like this in your transports 
file during your migration:

knownuser1 at example.com     lmtp:unix:/var/run/cyrus/socket/lmtp
knownuser2 at example.com     lmtp:unix:/var/run/cyrus/socket/lmtp
knownuser3 at example.com     lmtp:unix:/var/run/cyrus/socket/lmtp
example.com                smtp:[ip.address.of.exchange]

see the man page for postfix's 'transport' for more details.

You might also be able to make use of an ldap 
mailbox_transport_map to do the same thing:

http://www.postfix.org/postconf.5.html#mailbox_transport_maps

- Dan