isync (mailbox synchronizer)

isync is a command line application which synchronizes mailboxes;

currently Maildir and IMAP4 mailboxes are supported. New messages,

message deletions and flag changes can be propagated both ways. isync

is suitable for use in IMAP-disconnected mode.

Synchronization is based on unique message identifiers (UIDs), so no

identification conflicts can occur (as opposed to some other mail

synchronizers). Synchronization state is kept in one local text file

per mailbox pair; multiple replicas of a mailbox can be maintained.