LibreMail is a free and open-source email client for Android, built with Kotlin, Jetpack Compose and Material 3 (Material You). It aims for a friendly default experience with power-user features tucked under an Advanced Settings group.

Features:

* Send and receive email with Outlook/Microsoft (OAuth 2.0), Gmail, Yahoo and iCloud (app password), and any other IMAP/SMTP provider
* Guided first-run onboarding: welcome, vendor picker, per-vendor setup, then straight to your inbox
* Offline-first: a local mail cache with full-history backfill (resumable) and an optional device-only retention limit
* Multiple accounts with a unified inbox and per-account filtering
* Rich-text compose with a formatting toolbar, per-account signatures, drafts, and a reliable background outbox
* Message bodies rendered in a hardened WebView: JavaScript off, remote images blocked by default (tracking-pixel protection)
* On-device new-mail notifications (no push service), with optional instant push via IMAP IDLE
* Search across cached mail and the server (IMAP SEARCH)
* Attachments: download on demand, open in a system viewer, and attach files when composing
* mailto: link handling and share-to-email
* Material You dynamic theming, light/dark, edge-to-edge

Privacy and security:

* No ads, no analytics SDK, no tracking. By default network traffic goes only to your mail providers.
* Credentials are encrypted with the Android Keystore; OAuth uses Authorization Code + PKCE.
* Optional (opt-in) extras: SQLCipher cache encryption, a biometric/device-credential app lock, Android Backup of settings only, and local-only debug reports that are sent nowhere unless you explicitly submit one.

LibreMail is licensed under the GNU General Public License v3.0 or later.
