Changing Hosting - will I keep my old emails and contacts

[@wnd2013]

Hello, I am changing my hosting platform for my email. They use Roundcube. I was wondering will my old emails and contacts stay intact? Also how do I backup all the emails at once? I see how to do one email, not a batch. Thanks.

[bburg]

That's right, you only can export one email at the time in Roundcube. 
Can't you use an IMAP client?