R2Mail2

R2Mail2


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 some people do not understand difficult sentences:
THIS IS DEMO WHICH DISPLAYS ONLY THE NEWEST 10 MAILS!

The unlimited edition of this app will be available via the Google Play Store in form of a purchasable key. The free version of R2Mail2 is also a replacement for our established and also free app X509Tools - so the ability to decrypt or verify content (in form of p7m-files) is even available without creating a mail account. To unlock the R2Mail2 and see all messages please install "R2Mail2 License" from Google Play (https://play.google.com/store/apps/details?id=at.rundquadrat.android.r2mail2license).

Features:
* 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

PLEASE DO NOT REPORT ERRORS IN COMMENTS! We cannot react on that!
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.

The private key you use for signing and decryption is bound to the validity of the certificate. This means, that after the certificate is revoked or no longer valid (because the date stated in the field “Valid To” of your certificate is in the past) signatures will not be possible. Nonetheless, we implemented the function to decrypt messages with private keys even with no longer valid certificates. So your messages will always be available to you, even with older keys.

For more information visit http://r2mail2.com

Recent changes:
- Fixed MasterPassword creation on Android 4.3 - reinstall required if you tried before
- Improved memory usage while singing PGP/MIME with attachment
- Build CertChain less strict and use subject if SKI and AKI are messed up
- Remove comment '>' from forward messages
- Download CRLs from http before ldap
- PGP messages encrypted with a passphrase (symmetric) can be decrypted
- Delete cached files on SD correctly
- BugFixes
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Free
84
4.2
User ratings
206
Installs
10,000+
Concerns
1
File size
5611 kb
Screenshots
Screenshot of R2Mail2 Screenshot of R2Mail2 Screenshot of R2Mail2 Screenshot of R2Mail2 Screenshot of R2Mail2 Screenshot of R2Mail2

About R2Mail2
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 some people do not understand difficult sentences:
THIS IS DEMO WHICH DISPLAYS ONLY THE NEWEST 10 MAILS!

The unlimited edition of this app will be available via the Google Play Store in form of a purchasable key. The free version of R2Mail2 is also a replacement for our established and also free app X509Tools - so the ability to decrypt or verify content (in form of p7m-files) is even available without creating a mail account. To unlock the R2Mail2 and see all messages please install "R2Mail2 License" from Google Play (https://play.google.com/store/apps/details?id=at.rundquadrat.android.r2mail2license).

Features:
* 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

PLEASE DO NOT REPORT ERRORS IN COMMENTS! We cannot react on that!
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.

The private key you use for signing and decryption is bound to the validity of the certificate. This means, that after the certificate is revoked or no longer valid (because the date stated in the field “Valid To” of your certificate is in the past) signatures will not be possible. Nonetheless, we implemented the function to decrypt messages with private keys even with no longer valid certificates. So your messages will always be available to you, even with older keys.

For more information visit http://r2mail2.com

Recent changes:
- Fixed MasterPassword creation on Android 4.3 - reinstall required if you tried before
- Improved memory usage while singing PGP/MIME with attachment
- Build CertChain less strict and use subject if SKI and AKI are messed up
- Remove comment '>' from forward messages
- Download CRLs from http before ldap
- PGP messages encrypted with a passphrase (symmetric) can be decrypted
- Delete cached files on SD correctly
- BugFixes

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User reviews of R2Mail2
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Android Market Comments
A Google User
Aug 24, 2014
Not too shabby Have been searching all day long for an email app that supports S/MIME and decided to check this one out. Encryption and Digital Signature works just how one would expect it to. The UI seems cluttered and is not nearly as nice and smooth flowing as it should or could be. It would also be nice to have help documentation either in the app or linked within the app. Not everything is super cut and dry and some settings aren't very clear on what they are actually doing. Over all, a solid 3 1/2 stars. Mostly because I can see that the UI has been "in the queue" since March 8, 2014. So either the UI update just hasn't yet come, won't be coming, or has already come and this was the best you could do. Also, the lack of proper documentation or at least explanation for some settings brings the rating down some as well.
A Google User
Aug 24, 2014
I'm very impressed with this app! I've been pretty disappointed in Android mail clients so when a friend recommended R2Mail2, I didn't hold out a lot of hope for it. I'm so glad I went ahead and took the plunge anyway. This is a *great* app! It's one of the best - if not THE best - mail application I've used on Android yet (and that includes K9). It's fast, efficient, and can even handle S/MIME. My advice? Try the free version. I guarantee you will buy it within an hour. The only thing I wish it could do, and I'm going to suggest this on the beta group, is encrypt to more than one key for a given email address. That would make this app perfect.
A Google User
Jun 30, 2014
Nice but needs a lot of work It's great, one you have it working. The ui needs a lot of work, usability is low. Very generic errors, not intuitive at all. It has great potential to be excellent, but for now is not good enough yet.
A Google User
May 21, 2014
NOT Secure - Master password is not working I can't setup r2mail with master password it crashes every time. I'd paid for this app.
A Google User
Apr 30, 2014
Add DEMO to the title, and don't call users stupid. The description does now say there is a ten-email limit on this demo, after the first paragraph. I would have raised my review to 4 or 5 stars, but insulting your customers, "because they [allegedly] don't understand difficult sentences," is very poor business and doesn't make up for lack of clarity on your part; simply add the word 'demo' to the app title and nobody would be surprised.