What is K 9 Mail

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.

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 ]