477 reviews
Content rating
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

To mitigate efail please consider the following:
- Install Version >= 2.40.264
- Disable HTML view (Settings->Display->View HTML content by default->off)
- Do not download remote content

R2Mail2 is an email client for Android OS which provides cryptographic capabilities, such as Digital Signatures and Digital De- and Encryption based on personal Soft-Token keys (.p12 format), as for example provided by a Trust Center or generated by PGP applications. Even though we focus on the best cryptographic experience in the Android email world, we try to provide a full functioning mail client with corresponding safety features in general.

Since version 2.50.295 R2Mail2 is free to use and does not require a license app for full functionality.

* E-Mail Server: IMAP (incl. pushmail/idle), POP, SMTP and Exchange (>2007 SP1)
* SSL with X-509 client certifiate authentication
* An database in which the mails are stored encrypted
* Special Attachment View (browse your attachments without checking single mails)
* Unified Inbox and E-Mail Threading
* Peak Options for check intervals
* Search Function for messages per Folder
* IMAP shared folders

Main Cryptographic Features:
* Private keys and passwords are stored in an encrypted database (Key-Store) and protected by a Master Password.
* The security settings allow the configuration of encryption parameters, signature and certificate validation methods (OCSP and LDAP).
* Full S/MIME and PGP Plain and PGP MIME support
* Automatic selection of S/MIME or PGP for each recipient
* Full support of Android Root Store
* Certificate import of .crt, .pem and .asc formats
* Certificate/Key import from KeyServer LDAP or HKP (HTTP)

The application needs the following Android permissions to run:
* Full Internet Access - required to send and receive emails
* Modify/Delete SD card content - required to access the private key store, download attachments and to write log-files
* Read Contacts - required to suggest email addresses from your contacts
* Network State - required to check if an Internet connection is present
* Vibrate – required for notification purposes
* WakeLock - to allow service to check mails in background

If you get errors please use "Menu -> Report Error" on the start-screen to send us the log-file information in your preferred way!

Informations about Private Key and Validity Handling:
The application comes without a personal key pair (the users private and public key) - so it is fully functioning in the sense of sending and receiving emails as any other mail client and provides the correct usage of validation if the mail you receive is signed by the sender.
For signing or encrypting a message it is necessary to use a private key you own. Turn to a Trust Center of your choice as a source of supply. You can find a list of trust centers, which are trusted within the Android world, in the Certificate Store (CA section) of R2Mail2. Please be aware that this app can only support Soft-Token in form of P12-files and will not work with smartcard-based certificates.

For more information visit http://r2mail2.com
Updated on
Sep 7, 2021

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

434 reviews
A Google user
June 16, 2019
Seems to work fairly well. integrates encryption well. It does seem to have a problem with notifications though, it doesn't always send a notification even if there is mail. It also, sometimes, marks new mail as read. A combined spam & trash option would be nice too.
Did you find this helpful?
Anthony Edward Cooper (Tony)
October 24, 2020
Really good security options but as a functioning email client it is terrible. Even when you press on the 'download remote content' it doesn't format properly for some emails and for others you don't even get the option in the first place. Navigation is also limited, e.g. no obvious way to go straight to the previous email etc (you have to back out to the message list), and it's very slow at fetching email bodies. Also it hasn't been updated in ages so it's probably abandoned.
1 person found this review helpful
Did you find this helpful?
Saladin Ewald
July 19, 2021
It used to be good at the time and age where there was no real alternative which also supported mail encryption. Now it's just a clumsy abandoned app, slow at performing its tasks with confusing settings, many errors when fetching mails and a very bad behaviour when it comes to searching for messages. Do yourself a favor and use much greater open source alternatives like fairemail. I bet, the developer himself does so.
2 people found this review helpful
Did you find this helpful?

What's new

- Still hunting this crashes where Android kills the app because of Background activities. Hopefully its getting better not worse.
- Fixed crash after sending emails
- Fixed auto-fill for Masterpass
- Force focus on 'To' field on email creation