Dovecot Replication: First Run

Greetings,

I'm working on building a redundant Dovecot server which will be replicated with my original. I would like to know if there's any potential problems I could run into in running this for the first time. For example, during an initial sync is it possible for the new server to sync improperly with the original and delete all of the emails on the original?

Are there any gotchas that I should be aware of when doing a first run?

-- --Asai