imapsync

Imapsync is a popular, robust command-line tool designed for migrating, syncing, or backing up email accounts between two IMAP servers. It is widely used by system administrators and users to transfer emails from one provider to another, such as migrating from Gmail to Microsoft 365 or between on-premise servers.

Here is a detailed overview of what Imapsync does and its key features: Key Features of Imapsync

Incremental Sync: Imapsync only copies new or modified emails. If a migration is interrupted, it can resume without duplicating existing emails, making it highly efficient.

Recursive Folder Transfer: It synchronizes the entire folder hierarchy (inbox, sent items, subfolders, etc.).

One-Way Synchronization: It works as a one-way sync (source to destination).

Flag Preservation: It ensures that email flags, such as “read/unread” and “deleted” status, are preserved on the destination server. Cross-Platform: Imapsync runs on Linux, Windows, and macOS.

Online Version: There is a web-based version available for smaller, quick migrations without needing to install software. Limitations

No Contact/Calendar Sync: Imapsync only transfers email messages. It cannot migrate calendar items, contacts, or tasks, as these are typically not handled via the IMAP protocol.

Not for Real-Time Sync: It is designed for migration, not for keeping two email accounts actively in sync while both are actively being used. Typical Usage

The tool requires the login credentials (host, username, password) for both the source (–host1, –user1, –passfile1) and destination (–host2, –user2, –passfile2) servers. Example Command:

imapsync –host1 ://source.com –user1 [email protected] –passfile1 /path/to/pass1–host2 ://dest.com –user2 [email protected] –passfile2 /path/to/pass2 Use code with caution.

For more details and to access the tool, you can visit the Official Imapsync website. If you’d like, I can: Explain how to install it on a specific operating system.

Provide more complex command examples for specific providers (like Gmail or Exchange). Recommend alternative tools for calendar/contact migration. Let me know how you’d like to proceed! Official imapsync migration tool ( release 2.314 )