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I just traded in for Sparrow and want to clear up some space on my hard drive. Is it safe to remove the ~/Library/Mail/V2/IMAP-[mailbox] folders for any mail accounts that I have removed from

EDIT: In response to the two "if by safe I assume" answers. I meant both "won't break Mail if I open it again and re-enable those accounts." and "won't delete the messages on the IMAP server"

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up vote 11 down vote accepted

By safe, I assume you mean "will not delete message on the server?" That's correct, you can go ahead and delete those - think of the as a "cache" of your emails. As long as you aren't deleting and emptying the trash from within whatever mail client you are using, they will remain on the server.

Do consider a backup before deleting ANYTHING from ~/Library (or any other Libraries on your Mac).

In this specific case, I would explicitly rebuild the mailbox indexes just in case the system will clean them up once you're done deleting things...

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Also note this is true for IMAP email accounts but it may not be true if you have POP email accounts. POP, by default, will download messages from the server and then remove them from the remote server. – Samuel Mikel Bowles Sep 10 '11 at 0:29
good advice to back stuff up. Now I'm stuck in a "Duplicate Account" cycle that I cannot solve since I didn't do this. I'll probably solve it, hopefully ;) – Dan Rosenstark May 28 '15 at 15:35

By safe, I assumed you meant "will this screw up my computer?"

The answer is no, it will not mess up your computer... your computer will be just fine. stores it's data in ~/Library/Mail/* Removing this folder will not mess up the way the computer behaves, and if you launch in the future, it will simply recreate these folders as needed.

You may however want to back up the files in case you realize that there was something in there that you needed...

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