R2Mail2
- 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
Category : Communication
Reviews (28)
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.
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.
Been using R2Mail2 for a few days now. So far so good. I really like the interface, but it really needs a SELECT ALL button so you can select an entire folder full of messages at a time without having to tap each and every one.
Long time no updates but now after the recent two I cannot open any mails anymore. When I try to open one it loads it forever. I deleted all local mails and reorganized the mail store. After (re-)fetching the mails from the IMAP server i can open them but later it's again impossible.
I've been using r2mail2 for many many years. my requirement was pgp/gpg. Previously used c@tmail, pep mail, and k9 for multiple years then discovered this one. This one works best, seems to be the most secure, and everything just works. I forgot that I had to pay for it, whatever that amount was, it's certainly worth it. If you want a private email client that does everything an email program should do, go with this one.
Been using it for some time checking several mail accounts. Best mail app for Android, also supporting encryption. Most recent crashes appear to be fixed with 2.53.303 as well now. Thanks.
This is my overall favorite Android mail app, and I have tried a lot of them. When I say a lot, I mean hundreds of email APKs, i have used, de-compiled, reverse engineered with Kali's android MASVS tools. This app has strong overall encryption functionality, including storage of emails locally as well as ability to use email encryption within the app, so long as you have your key. Good stuff.
Good email client, but with old crypto. One can sign email only by using RSA-based certificate. No ECC support yet, which is sad. It is 2019... OAuth2 cannot request token on Android 10. You cannot setup GMail account at all. I think this email client is abandoned.
Great app with simple and minimalist design, but powerful functionality is there. Thanks to developer for bringing updates since a while.
let's encrypt certificates not working? "certificate chain not valid - cannot find trusted root" No problems with Thunderbird, K-9 Mail and Fairmail.
Best for multiple encryption options, both GPG & Smime. Master password protects all from access.
Requiring contacts for functionality is unnecessary. Doesn't matter what you claim, only what you prove matters. Internet, & forced contact permission is a privacy invasion. I gave it another try, & my one star remains. You clearly don't understand privacy.
Are there any plans to make R2Mail2 available for Chromebooks as an Android app? Right now, Android Play says "This item isn't compatible with your device" (Pixelbook)
Need root???????? How to setup gmail?????root access mandatory?????not working!!!!!
I am not getting notifications of new emails
Sign/encrypt/decrypt operations all work flawlessly. Security features are great. POP3 and IMAP support are seamless.
FINALLY! An S/MIME email solution that works. Thank you.
while it has a ton of general settings, being more flexible than other android apps, it is NOT my email client of choice. It has two major flaws: IMAP folders are not refreshed automatically and the app does notify you when you recieve a new message. Is this hard to get a good email app these days.
I have found this to be an excellent email program since installing it back in 2014. No app is perfect and there are one or two niggles, but it covers smime encryption well, handles multiple email accounts in both POP and IMAP form. Well worth it. Edit: 2 Dec 17: After android 8 update on Nokia 8 checking emails on Google's Gmail fails 'couldn't connect to host', then something about crypto... Other IMAP mailboxes ok.
Only I missing GCM and CHACHA20 algorithm. I always have to type full name when I add a new account (missing default value). And I missing to set delete mail behavior, I prefer to move to the next message (now exit to mail list). Google mail works only with application password (I have two factor authentication).
Pretty decent application. There are a few issues with it that I'm hoping will be fixed. At the moment, despite the setting being off, it still encrypts the subject. Also, certain encrypted attachments cannot be decrypted.
Don't spend any money in this piece of trash. It is not possible to send a normal email without getting an error. If u hand some patience u can send an email after some attempts.
Simply the best. (some troubele shooting may be necessary for iMap and SMTP settings when using complex loginb with 2FA.) The only way to make this better is if you guys created a switch to turn off the stock Gmail app in Android. A simple built in app locker for mail apps that can not be uninstalled say in Nexus devices.
Doesn't support html. While it can view html, it can't compose html. What's really bad is the CSS stylesheet codes are visible in the quoted email and making everything look like junk.
Best email client that I've found for PGP encryption (which everyone should use for certain things, and which more sites need to implement).
I can't add account with all type, server and host can't connected
I'm starting to get to like this app. But, it requires a learning curve to use.
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.