Holy moly! I was totally shocked when I saw K-9 Mail pop up in BlackBerry World. The hugely popular open source Android email client works beautifully on BlackBerry 10 and its free! I am still surprised that BlackBerry allowed a third party email client into BlackBerry World (which used to be against their policies). Still they chose the best email client to allow through.
If you want to have a separate email address on your BlackBerry 10 device that is not in your hub (say a spam address) I highly recommend K-9 Mail. I would also recommend picking up K-9 Mail in BlackBerry World ASAP in case BlackBerry changes their mind and removes it!

Steve ( View Profile) - Posts: 686
Posted: February 4, 2013 at 1:32 PM EST from my BlackBerry PlayBook | OS 2.1.0
Appears to be available for PB running 2.0.1.1314 also.
CJ Not Registered
Posted: February 4, 2013 at 3:25 PM EST
Yes this is available on PB from a month or so and has not been removed, so I am guessing it is here to stay. Btw it is Android port on PB, is it same on BB10 also?
mark Not Registered
Posted: May 20, 2013 at 2:54 PM EST from my BlackBerry Q10 | OS 10.1.0.1483
It’s not available on blackberry world anymore. BB10 sucks. I am a diehard fan of blackberry but their stupid policies are making me go away