Sterna Mail

Sterna Mail

Private email client for JMAP and IMAP/SMTP. No Google services, no tracking.

emon Email

Download (6.8 MB) Website

Screenshots

Screenshot of Sterna Mail Screenshot of Sterna Mail Screenshot of Sterna Mail Screenshot of Sterna Mail Screenshot of Sterna Mail Screenshot of Sterna Mail Screenshot of Sterna Mail Screenshot of Sterna Mail

Description

Sterna Mail is a free, private email client for Android. It is built for JMAP, the modern successor to IMAP, and works just as well with any IMAP/SMTP provider.

No tracking, no ads, no Google services. The code is GPLv3, and F-Droid checks that the app it ships is byte for byte the one built from the published source.

Reading:
* Several accounts, JMAP and IMAP side by side, with a unified inbox that works offline
* Conversations, search as you type and snooze

Writing:
* Several identities, each with its own signature
* Undo send and scheduled send

Privacy and security:
* OpenPGP encryption through an app such as OpenKeychain
* Remote images and tracking pixels blocked by default, app lock with fingerprint or PIN

Setup and notifications:
* Setup from your email address alone, or a manual form when the domain publishes nothing
* Push notifications without Google, over JMAP, IMAP IDLE or UnifiedPush
* Available in eleven languages

What’s new (1.6.3)

Replied and forwarded marks now show in the message list and the message header, and Sterna sets them on the original when your reply or forward is sent.

"Edit as new" in the message menu reopens a message in the composer as a new one.

An optional Starred entry in the folder drawer.

Hungarian interface.

On wide screens, filter, sort, mark read and move fold into the menus when a message is open beside the list.

An HTML signature that is only an image is no longer dropped.

Versions

Version Date Size Requires Android Download
1.6.3 current
c9ac2bc701447b88…
 2026-10-22 6.8 MB API 26
1.6.2
203884992331ad19…
 2026-10-14 6.7 MB API 26
1.6.1
3122fde7119bcb85…
 2026-10-08 6.7 MB API 26

Permissions

What the app asks the system for. Android only grants sensitive access after you confirm it.

  • Internet accessSend and receive data over the internet.
  • Network stateCheck whether and how the device is connected.
  • NotificationsShow notifications.
  • Read contactsAccess the address book.
  • Foreground serviceKeep running in the background, visible in the status bar.
  • FOREGROUND_SERVICE_SPECIAL_USE
  • Run at startupStart automatically after the device is switched on.
  • BiometricsUnlock with fingerprint or face.
Show 3 more permissions
  • FingerprintUnlock with a fingerprint.
  • Prevent sleepingKeep the device from going to sleep.
  • sterna.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

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