isync ☆

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Description:
Synchronize a maildir with an IMAP server

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Productivity

Tags: email imap maildir sync cli

Install: brew install isync

About:
Isync is a command-line utility that synchronizes a local maildir with a remote IMAP server. It efficiently downloads and uploads emails, maintaining folder structure and flags. This tool is essential for users who prefer local mail storage and offline access while keeping their mail synchronized with an email provider.

Key Features:

Synchronizes maildir with IMAP servers
Supports SSL/TLS encryption for secure connections
Handles folder creation, deletion, and renaming
Preserves email flags and keywords
Configurable synchronization patterns

Use Cases:

Backing up email from an IMAP server to local storage
Synchronizing email across multiple devices via a shared server
Migrating email between different email providers

Alternatives:

offlineimap – Isync is often considered faster and more actively maintained than offlineimap
mbsync – mbsync is actually the name of the binary provided by the isync package

Version History

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