here is my problem:
- All my users are on the same domain : foo.com
- Some of my users are managed by an open source linux system (exim+ldap+courrierimap :SERV1) and others by a Microsoft Exchange Server (SERV2).
The first thing i want to do is replaced SERV1 by Zimbra OSS.

I've migrated all the users from SERV1 to zimbra without any problem.All works perfectly except when I try to write to users who are located on SERV2. Zimbra doesn't know the users and refuse to send mail. I've tried to add "luser_relay = $mailbox@SERV2" in postfix configuration but without success.
Any ideas ?

Thanks in advance

PS: Excuse my poor English ...