My work email only permits us to store a relatively small number of emails on the exchange server. I'm using Mail under the latest version of Lion. I've been archiving all of my older emails on my mac in folders under "On my Mac". I have an archive folder for each of my projects. Sometimes when traveling, I bring my MacBook Air. I'd like to have access to those archived emails. Is there anyway to sync the messages stored "On my Mac" between computers? Will I screw up the index if I put the ~/Library/Mail/V2 folder in Dropbox and connect the MBA to it with a symlink? Any other thoughts on how to do it?