Seven years of development, including adding OAUTH2 support.
(Note on numbering: went from 1.999 to 2.100 to avoid 4 digit minor. The
2 isn't "meaningful" in a major number sense.)
imapsync is a tool for facilitating incremental recursive IMAP
transfers from one mailbox to another. It is useful for mailbox
migration, and reduces the amount of data transferred by only
copying messages that are not present on both servers. Read, unread,
and deleted flags are preserved, and the process can be stopped
and resumed. The original messages can optionally be deleted after
a successful transfer.