thunderbird@esr
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Description:
Customizable email client
Type: Cask  |  Latest Version: 140.7.2esr@0  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  @Mozilla  |  formulae.brew.sh
Category: Productivity
Tags: email esr thunderbird client imap privacy
Install: brew install --cask thunderbird@esr
About:
Mozilla Thunderbird ESR is an extended support release of the popular open-source email client, designed for stability and long-term reliability. It provides a full-featured email experience with robust spam filtering, advanced security, and extensive customization options through add-ons. This version is ideal for organizations and users who prioritize a stable, predictable email environment over frequent feature updates.
Key Features:
  • Extended Support Release (ESR) for maximum stability
  • Powerful built-in spam and junk mail filtering
  • Support for multiple email accounts and protocols (IMAP, SMTP, POP3)
  • Integrated calendar and task management (via Lightning add-on)
  • Robust privacy and security features, including phishing protection
Use Cases:
  • Managing multiple email accounts from a single unified interface
  • Corporate or organizational environments requiring a stable email client
  • Users needing advanced customization through a rich ecosystem of add-ons
Alternatives:
  • Apple Mail – Native macOS client, more tightly integrated but less customizable
  • Microsoft Outlook – Commercial suite with deep integration into Microsoft 365 ecosystem
  • Spark – Modern, freemium client focused on smart inbox and team collaboration
Version History
Detected Version Rev Change Commit
Feb 16, 2026 5:11pm 140.7.2esr 0 VERSION_BUMP 22435262
Jan 27, 2026 7:56pm 140.7.1esr 0 VERSION_BUMP 0814dc3e
Jan 13, 2026 11:01pm 140.7.0esr 0 VERSION_BUMP 69614663
Sep 17, 2025 2:38pm 140.3.0esr 0 VERSION_BUMP e1adbda3
Sep 16, 2025 2:57pm 140.2.1esr 0 VERSION_BUMP 5923f57a
Sep 15, 2025 1:06pm 128.14.0esr 0 VERSION_BUMP c459aa6c
Aug 19, 2025 10:47pm 128.14.0esr 0 VERSION_BUMP 6418de8c