Changelog

0.1.0 — 2026-09-01

First public Feather Mail release.

Native GTK4/Relm4 three-pane mail client for Linux with multiple accounts and All Accounts views.
Local SQLite cache, background IMAP/SMTP synchronization and a durable offline operation queue.
Threaded reading, compose/reply/forward, drafts, attachments, archive, trash, star, mark read, move, snooze and undo.
Local FTS5 search with operators and globally ordered results across accounts.
Safe HTML rendering with JavaScript disabled, CSP isolation, tracking protection, remote-image controls and a bounded CSS allowlist that preserves common sender layouts.
Inline CID raster images and system-default opening for downloaded attachments.
Recipient autocomplete from received and successfully sent mail.
Keyboard navigation, desktop notifications, update checks and pull/wheel-to-refresh.
Optional local MCP stdio server, disabled by default, sharing the same Core command bus and permission model as the UI.
.deb and AppImage packages for x86_64 Linux.

No telemetry.
Passwords and tokens use the system keyring, never SQLite or diagnostic exports.
Remote images and tracking pixels are blocked by default; link confirmation and plain-text preference are functional settings.

Add Account is manual IMAP/SMTP in 0.1. Google and Yandex generally require app passwords. Microsoft 365/Outlook.com may reject password-only authentication; interactive Microsoft OAuth is not yet available in the UI.
The runtime floor is GTK 4.10 and WebKitGTK 6.0. The AppImage intentionally relies on the host WebKitGTK runtime.
Packages were built and smoke-tested on Ubuntu 25.10. Other distributions listed in the install guide match the required package versions but have not all been exercised yet.