offlineimap smart backup synchronization = bidirectional synchronization without deleting any messages

[Edward Z. Yang]

Excerpts from proxym's message of Tue Dec 18 22:27:15 +0800 2012:
> But synchronisation is broken now. Deleted from remote imap messages
> are not deleted from local maildir, but these messages are not
> restoried to remote imap. It is very bad.
> How to add auto restoring messages to remote imap repository?

That's because they're in your Status cache.  So if you clear that
then OfflineIMAP will attempt to upload everything. Though, in my
experience, this is rarely what you want.

Edward