So I've got about 100 users that I am (most likely) going to be moving to Zimbra. All of them are currently pop3 through sendmail.
Here's my problem that I need advice on. I'm not a huge sendmail guy. I need sendmail to look at the recip address and pass it on to Zm if and only if I specify that user.
I want to migrate slowly. Start with IT, then move on to some guinea pigs, then everybody.
Any thoughts? I'd be up for going the other way if needed too... (ZM as main MTA passing on everything except valid ZM users...)