IMAP sync tool (rsync for IMAP)

[Rob Mueller]

> I already mailed the author of imapsync about that some days ago but
> without having an idea how to fix it. I also checked Mail::IMAPClient and
> found that it lacked the functionality needed here but it seems
> Mail::IMAPClient isn't maintained anymore (at least there is no
> development for long time now).

I don't know how much work it would be, but you could look at 
re-implementing using Mail::IMAPTalk. It's the IMAP client I built for use 
at FastMail.FM after finding problems with the other ones available at the 
time (about 4-5 years ago now). It definitely allows capturing a literal 
response into a file handle, and sending a file handle as a literal response 
to avoid storing everything in memory.

Rob