K-9 Mail is one of the popular Android App in  category published by  K-9 Dog Walkers  in Google Play Store on . K App has gained over 5,000,000+ downloads+ install from Android users with a aggregated rating of 4.23 from 88,795+ users in Google Play Store and content rating of  Everyone.
Here are some comments Android users has to say about K-9 Mail:
There are a lot of Communication Android Apps which offer similar features like K, you may notice some of them are also developed by K-9 Dog Walkers.
K-9 Mail is an open source email client with support for multiple accounts, search, IMAP push email, multi-folder sync, flagging, filing, signatures, BCC-self, PGP/MIME & more! Read More
K-9 supports IMAP, POP3 and Exchange 2003/2007 (with WebDAV).
Install the app "OpenKeychain: Easy PGP" to encrypt/decrypt your emails using OpenPGP.
K-9 is a community developed project. If you're interested in helping to make the most popular open source email client on Android even better, please join us! You can find our bug tracker, source code, mailing list and wiki at https://github.com/k9mail/k-9
We're always happy to welcome new developers, designers, documenters, bug triagers and friends.
If you're having trouble with K-9, please report a bug at https://github.com/k9mail/k-9 rather than just leaving a one-star review. We don't mind you telling the world that you're frustrated, but if you use our bug tracker, we have a better chance of fixing whatever's giving you a hard time.
You can find K-9's release notes at: http://bit.ly/new-k9
(People sometimes call K-9: K9, K9 Mail, K-9 Email, K9 Email, K9 E-Mail, k9mail or k9email.)
Below you will find list of Apps similar to K-9 Mail for Android in Communication genre.