How to fix Mail stuck importing messages from a Time Machine backup? I'm setting up a new Mac from an old one, and everything's working perfect, except for getting Mail set up.

This is what I'm seeing with Mail:



The "Time remaining" figure just keeps increasing, while the "Imported X of Y messages" number gets stuck on 14.

I've tried searching Apple's support community, but none of the suggestions there have helped. Any ideas on how to fix this?
If it is IMAP or Exchange you can skip this process and just add your account afterwards.

I would not advise to skip it if it was a POP3 account because usually it means you only have a local copy of those mailboxes and won't get synced when adding the account again.