I'm hoping someone can explain this behavior with Internet Addresses.
I have a Scalix server (mailhost.domain.com) running temporarily alongside our main mail server (mx.domain.com), and I'm gradually moving users to the Scalix server. In order to allow the systems to co-exist, I forward mail for migrated users from the old server, but since mx.domain.com believes itself to be authoritative for the domain, I need to reference a sub-domain: mailhost.domain.com. (The Scalix server will eventually be authoritative for the domain.)
For example, Jim Bob has an account on the old server as jbob@domain.com, and an account on the Scalix server as jbob@domain.com.
Here's where the odd behavior comes in. If I add another sub-domain Internet Address for the user on Scalix like so: jbob@mailhost.domain.com, Scalix rejects mail (no known user) for that Internet Address, because - I'm assuming - jbob@mailhost.domain.com somehow collides with jbob@domain.com. However, if I use an Internet Address with a different username (example: jbo@mailhost.domain.com or jbob1@mailhost.domain.com), Scalix will accept mail for that Internet Address.
Is that by design?
--Aaron
(My apologies if this has been answered elsewhere--I couldn't locate it.)