imapsyncImapsync is a command-line IMAP transfer tool that migrates or backs up IMAP mailboxes by performing incremental and recursive transfers between accounts over the internet or a local network, and it runs on Windows, Linux, and Mac OS X, with an online trial service available. It cannot migrate Contacts or Calendars, cannot maintain two-way synchronization, and cannot back up to or restore from a local directory; it only handles IMAP accounts. The product is sold with options including standalone binaries and an online service, offers a 30-day money-back guarantee, and sometimes provides special pricing when bought with support.