Hi all,

we plan to replace our old mail server with new a new one. The
replacement is part of a bigger change within our organizations
infrastructure. Another thing that is going to change is our user
management infrastructure, which also provides the Email-Usernames with

acco...@mydomain.tld

As we change to the new infrastructure, old accounts will be dropped so
that

old-acco...@mydomain.tld

is no longer available on the new mail server. However, we need to give
the old users access to their emails for some more time, leaving the old
mail server in place.

What I'm trying to do now is: Accept mails for @mydomain.tld on the new
server and try to deliver them to the local accounts. If that fails,
send it out to the old server and try to deliver it there.

I had a look at the documentation but couldn't come up with an easy
solution for that. The only solution I can see so far is to create an
transport entry on the new server for _every_ email address that needs
to be delivered to the old server.

Is there a better solution for what I'm trying to do?

Best regards,
 Lothar

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