Manual whatis

K-9 Mail is an email client - a Mail User Agent, in the dry terminology of the RFCs - which runs on the Android operating system; Google's Linux-based OS for smartphones.

It started life as a fork from the Android Open Source Project's Mail client program by Jesse Vincent of Best Practical Software and is now in version 3.x in 2011.

It supports multiple mailboxes, each independently -- and extensively -- configurable, using POP3, IMAP4 (including IMAP IDLE push on a per-folder basis) and Exchange 2003/7 WebDAV protocols.

And yes, it's named after the dog. RIP Elisabeth Sladen.

[ It's an exceptionally cool program, with -- as usual in the FOSS world, weak user documentation. I'll be putting some work into that in the next week or two. I have to contribute somehow, since I can't write code. :-) If I've incorrectly extracted any facts from the available universe, well, it's a wiki: correct them. --Baylink 4May11 ]