I've got a little question. I have exim mailserver, but I'm planning migration to Zimbra. The problem is that I allready know I won't make this migration in one day.
So I'm going to make two mx entries in DNS.
mx.domain.com (old mailserver) with lower priority
mx2.domain.com (new mailserver) with higher priority
When someone will send an email to firstname.lastname@example.org, but zimbra (on new mailserver) won't have that account yet, I want it to forward that email to old mailserver.
Could anyone tell me how to do that in Zimbra ?