isync: free IMAP and MailDir mailbox synchronizer
isync is a command line application which synchronizes mailboxes;
currently Maildir and
IMAP4 mailboxes are
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
Synchronization state is kept in one local text file per mailbox pair;
multiple replicas of a mailbox can be maintained.
isync is free software in the sense of the
GNU GPL v2.
- Fine-grained selection of synchronization operations to perform
- Synchronizes single mailboxes or entire mailbox collections
- Partial mirrors possible: keep only the latest messages locally
- Trash functionality: backup messages before removing them
- IMAP features:
- TLS/SSL via IMAPS and STARTTLS for encryption
- SASL for authentication
- Pipelining for maximum speed
isync should work fairly well with any IMAP4 compliant server;
particularily efficient with those that support the UIDPLUS and LITERAL+
Some servers require workarounds; see the README file for details.
While isync is the project name, mbsync is the current executable name;
this change was necessary because of massive changes in the user interface. An
isync executable still exists; it is a compatibility wrapper around mbsync.
Please use the mailing list for feedback.
Last update: Sun May 24 19:19:30 CEST 2015.