Download R2Mail2 apk 2.30 free for Android smartphone

26 Aug

Posted by rundQuadrat OG in Communication | Aug. 26, 2016 | 60 Comments

Apk file size: 8.3 MB

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:

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 (

* 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.

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

Whats new

    - Fixed POP3 issues
    - Compress images on attach
    - PGP Protected headers
    - IMAP mailbox fix
    - Fixed import of PGP keys without username
    - New info dialog for signature and encryption
    - Android 6 support
    - New synchronisation settings (disable QRESYNC, battery saving, ...)
    - New notification Feature - notify on every new mail
    - New wipe-password which deletes everything if entered instead of master-password
    - Language problem should be fixed

rundQuadrat OG part of our Communication and have average installs from 10000 to 50000. Last Update Aug. 26, 2016. Google play rating is 82.5414. Current verison is 2.30. Actual size 8.3 MB.

Download r2mail2.apk 8.3 MB


Philipp Baer

Very nice First mail app for Android that supports S/MIME and PGP/MIME properly! Actively developed and improved, dev responds very quickly. If it only was OSS'ed... :-)

Korvin Ezüst

Can't add more than one account and e-mails show up as random plain text. The description doesn't state this demo can handle only one account, nor does the description of the license key, so it's obviously a bug. Whenever I try to add a second account, at the very end I can't choose draft, trash, etc. folders and when I create the account without those, it won't show up anywhere, it just gets lost. Also now that I've tried adding a second account, the first stopped working properly, too. The messages show up as random-like plain text. And in the settings this message waits me: "cannot read stored application settings - please reinstall R2Mail2". I've sent error reports... but as far as my experiences with Android application support go I don't really expect anything. It worked for days, I wanted to buy it but I'm glad I haven't bought the license key just yet, probably I'd have just thrown my money out of the window.

A Google User

Working Well Again V 2.08 update working well - It finally solved my PGP signatures 'Not Valid' errors. I do miss the verbose progress information that used to be provided when updating/fetching mail. Great Job!

Jan Mühlig

Best mail app It is the best mailing app, only the synchronisation seems to be not perfect. Sometimes I have to wait more than 5 minutes (which is my interval) to receive new mails. Maybe that is fixed with the new (nice ui) update. In this case, I will increase the stars to 5 :)

Jonathan Summer

Nice update Updated UI is a nice improvement. I use this app for S/MIME (paid for the "full edition" license) and it works pretty well. Best Android experience I have found for encrypted email.

Derek Freudenthal

Amazing All security features are great. It would be nice when you opened the app that it would block visually the email accounts you have until the password is entered.

Shawn Nash

R2Mail2 Provides s/mime digital signing and encryption of email on android (works with standard certs issued by an authority). It works.

Stephen Cramer

4.6 Sign/encrypt/decrypt operations all work flawlessly. Security features are great.

Glen Barber

Great email application No complaints. Exactly what I have been looking for in a mobile email app that supports PGP.

Rob Williamson

A great app This is a pleasant to use application that does what it says it will - email security. I'm glad I bought it.

Anthony Papillion

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.

Rob Zell

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.

floramae catud

90 I like this things new n0 need 2 worrie yes!! I got you n0w...

Bruce Moore

Works well This is one of few Android email clients that handles S/MIME. It works well and is fairly easy to set up for Gmail. Getting your keys and certificates on to your phone will be the biggest challenge; I used Bluetooth file transfer. Note that the free version is really intended as a trial. You will way to pay the few dollars for the license key that poems up the full features.

Kevin Moraga

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.

Thijs van Ulden

Works ok Import of keys does not go from APG app. You must use files, not so nice because APG has this covered in a better looking and functional way. Low-res icons are used, make it look cheap. Typical phone-only interface, ugly folder overview is caused by that I guess. Handles attachments with encryption nicely. Good stuff, but not worth 5 Euro's just yet. Last update in august 2013..

Adamek 1974

Wld buy it if you added search online and widgets (especially combined folder)

Brian Rohan

Very well done! After fiddling for a day+ getting another combo of apps to work (the biggest issues was getting PGP keys imported), I was saddened that the combo did not support PGP/MIME. I am grateful that I came across this lesser known (for the time being) app. Very easy to setup, PGP/MIME works very well, and keys imported instantaneously. 5 star rating, not only for the app, which works incredibly well, but also for the support I receive any time I have a question. Well done. I encourage more folks to use this app and PGP for privacy!

Philip Southam

Best client out there for PGP/GPG email After evaluating K9Mail and Kaiten this is by far the best when it comes to "ease of use" and PGP. If you want a "secure" email client that's dead simple, look no further.

Felix Leimbach

Cannot get Mail from my IMAP Server I'm using web and email hosting at Hetzner and can't get R2Mail2 to connect to that server over ssl. It gives a technical error about a "premature end of file". Exact same settings work in every other mail client. Disappointed :(

mat amdis

How do I enter someone's public key? How do I copy n paste someone's public key in to this program? And if I can't copy and paste how am I supposed to import a public key?

Cristian Blanaru

Has everything you could ever want Highly recommended. It has all the features that I would like from an email client.

James Watson

Great for secure mail Finally found a good looking client that works well with GPG. Easy to set up and I've had no problems with it since installation. The only (minor) gripe that I have is the excessive use of exclamation marks in the setup dialogues which seem a little amateur in an otherwise very polished application. Paid for the full licence.

Gary Quigley

Widget? Seems great so far. Hassle free PGP, nice combined inbox, clean interface. Very stable. If it had a widget I would rate it 5....

A Google User

The PGP solution Great program. Hands down the app you need if you use encrypted email. I would like to see the option to enable sender and/or subject into the email notification. This app is worth every penny.

Jay Reffner

Flexible Crypto Good email app! I bought it for S/MIME and it handles it well. While the UI needs some aesthetic work, it looks better than other crypto email apps out there.

Scott Mustard

Awesome Great integration w gpg and x509

Claudiu C

The best solution for a beta version Going to buy a license

Pavol Luptak

Definitely continue and improve this e-mail client 1. When I reply to PGP/MIME email, the application will crash (replying to S/MIME emails works fine). 2. It would be fine if it is possible to exactly specify if the reply message will be S/MIME or PGP encrypted.

Shane Robinson

Just a demo Doesn't provide clear notice a that its a demo version (there is one indirect reference in a paragraph of the market description.) Doesn't generate keys. Looks promising otherwise

Kurt Smolderen

Really promising email client One of the best email clients I've used. Great support from the developer, a neat interface and support for some advanced features although they do not get in your way if you just want a basic email client. Some additional polishing and features will make it a 5 star app. But I'm quite confident I will give them in a while if development keeps making the same progress!


Getting better! A good start... And developer responds quickly. Glad that Exchange Server support is in the works.

A Google User

Was hopeful but... It marked all my emails as read....even though using imap. Surely this should not have happened?..

A Google User

quite ok... ... but has troubles displaying some HTML mails and importing self signed smime certificates

A Google User

Unstable Crashing almost all the time, when I try to open smime files:-(

A Google User

Very disappointing Not clearly declared: this is only a Demo Version! Crashes all the time...

A Google User

errors I discovered two errors. 1. Is not possible to create a digital signature, when in the certificate multiple e-mail addresses. It is possible only from e-mail, which in the first place in the certificate. 2. Is not possible save different login name for SMTP server than the IMAP server. But otherwise it is very good smime client.

A Google User

Excellent X.509 email client I have my own email server in my office, and so I need a client that can access (and to which Verizon charges an extra $14/mo for the "privilege" of accessing my "corporate email.". Grrrr...) my office server. However, I want an email client that can handle X.509 certificates, so that Sendmail (on the server) can decide whether or not to permit relaying based on who signed the client cert. To this end R2Mail2 is exactly what I need: It negotiates an encrypted link with Sendmail and identifies me.

Anton Nikolaiev

Good program, quick support I think this program has a great future. Nothing in excess. GUI is not overloaded with unnecessary icons. Easy to setup, easy to use. Encryption/decryption works like magic.

ilias khakimov

Great work! Still a lot to do, but PGP functionality is impressive. PGP/MIME is the killer-feature.

Виктор Рублев

Without pgp/mime Why did you write that the application has such feature as PGP/MIME? I've bought it only for this feature, but did not find it.

Александр Зорин

Good soft Please add exchenge support! Very need! Sorry for my bad english =)

Пользователь Google

SGS2 Waiting this app from x509tools and here it is! Behold! Maker you are great! But improve app's interface before you make it purchasable version. Maybe some new icons or colour themes.

Patrick Herbst

Works Pgp and smime. Nice. Works well.

bitter man

Good, but with a few additions could be great! Great email app, the only thing stopping me from buying the full app is the fact that I can't use my Yubikey Neo with this app...

Magnus Carlsson

Can't use it to access Google mail I got an email in my Gmail box stating that login was denied because it came from an app that doesn't fulfill modern security. I played around with the settings and tried googling out why, but failed. Too bad, it looked promising...

Thomas S

Excellent app for the security conscious As far as I know, this is the only app to support both Exchange and S/MIME. These features are what I needed, and both work well.

notlisted notlisted

Finally my passwords are safer! Was previously using K-9 mail app but was horrified when I discovered (like many email apps) it stored my email passswords in plain text on phone. I was delighted to find r2mail2 encrypts my passwords (and downloaded email messages) via Android's keystore process. I use a master password to unlock my mail and can set how long I want my decrypted passwords cached in memory. I haven't even used this for sending / receiving encrypted mail yet and I love it already! (Just wish it was open source)

Conor Klecker

Works with my company's certificates to sign and decrypt emails. Exactly what I was looking for. Exchange and IMAP working great as well.

Mike Dacre

Fantastic secure mail client This is easily the best mail client I have ever used on Android, PGP/mime support is perfect and easy to use too. Really great client.

Gary Cartagena

Stopped working within a day. The R2 mail demo worked until I installed the license. Then suddenly my ssl server connections were bad and my personal keys disappeared. What a complete waste of my time.

Jan Holmström

Master password does not work Log in to the app, exit and reopen. Now the app does not ask for password. This is absolutely unacceptable. I have emailed the company about it but they dont reply. So now they will get the message the hard way.

Jan Holmström

Master password does not work Log in to the app, exit and reopen. Now the app does not ask for password. This is absolutely unacceptable. I have emailed the company about it but they dont reply. So now they will get the message the hard way. Now suddenly the MP does not work at all. I can't use R2Mail2, HUH !

кРаВеда ^

The best secure email client for Android... ...and the best Android email client for MS Exchange, because it uses EWS.

Milan Markovic

last update june 2015 good app but not seriously supported - consider before paying for the license

Spies! Traitors! Collaborateurs! Liars!

Thank you Ssl as default, encrypted pwd as default would be nice. I could not find a way to generate pgp keys, or self signed smime or CA. Great app. Used k9ma** up to now

Mark Henderson

Very good PGP support is great. I wish it supported Gmail two factor authentication.

Andrey Shcheglov

Great MUA, but please add an option to store user data on the *external* SD card (or at arbitrary writeable location). Sony Xperia phones usually have a (smaller) internal SD card mounted at /storage/sdcard0, and an external one at /storage/sdcard1. My /storage/sdcard0/Android/data/ folder occupies 1.1G already, and I'd prefer my mailboxes stored under /storage/sdcard1 instead.

Nicholas Weightman

Brilliant This is a very well thought out app with so much going for it. This app is a must for anyone who uses or has an interest in encryption. I was a little skeptical as a lot of apps on Google have been abandoned and after paying for pro options on many, purchasing the pro licence key for this app was a gamble, but after reading some of the comments on here I made an informed choice to proceed. The developer does still seem very much active and has future plans for this app. Great purchase either way though.

Works great with IMAP servers Those of you, who run into issues with gmail, just allow access of "less secure apps" in you Google settings. Google did something with imap, preventing standard clients accessing their severs, even though encryption is used.

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