offlineimap

IMAP/Maildir Synchronization Tool

OfflineIMAP is a tool to synchronize IMAP and Maildir mailboxes and which uses a multithreaded synchronization algorithm. It offers several user interfaces and is configurable providing a great number of settings for controlling its behavior. There are several mechanisms for determining the list of mailboxes to synchronize. It supports internal or external automation, SSL and PREAUTH tunnels, offline (or "unplugged") reading, and a variety of esoteric IMAP features for compatibility with IMAP servers. OfflineIMAP takes precautions to avoid the loss of mails.