Penguin

RoundCube is a next generation WebMail client. (The 1st generation is probably stuff like SquirrelMail.) It's relatively new and unstable, but getting better all the time.

Its main selling point is that it's prettier than other WebMail clients.

lib/main.php:944: Notice: PageInfo: Cannot find action page

lib/main.php:839: Notice: PageInfo: Unknown action