Review on K-9 Mail by David Pirlet

I like that you can set up multiple folders, for example one folder per project or another depending if your working in home office / at work etc...

It's very customizable when doing mass emails (I have been using this mainly). The font size could be made larger so messages are easier read. This has nothing against kmail itself as i think they're both good software but just because there are many options out there we need something simple which doesn't get too complicated once started creating filters/rules/etc..