- Our default Web-Mail client is Usermin (part of Virtualmin Pro). But you can install and manage RoundCube as a script from the scripts installer, e.g. into a subfolder or subdomain.
- We support IMAP-S, therefore, the easiest way to migrate your account mail is to use that way: 1) sync your current account, *backup your client in case", create new (or modify existing) account, then resync with new account. This works of course if there are only a few mailboxes to migrate.
I now want to be as honest and clear as possible:
We do provide hosting services as a hosted solution for Joomla+CB+CB plugins sites, with some extra-flexibility that you don't find on usual hosted solutions. That's our main added value and focus. We are not here to do only hosting and to compete with any budget or professional dedicated hoster offering a wide range of custom services around the hosting itself.
We will be better at replying on most Joomla and CB-related issues (and actually have setup the hosting in a way that those do not have issues) than most of hosters.
So typically, things have been tuned to work best with Joomla+CB+CB plugins+most CB-integrated extensions.
Generally speaking, our hosting is highly automated reliable and redundant service for standard joomla+CB sites, and additionally very secure and stable web hosting. We also offer good email services, but it's not focussed on emails, or on special hosters work.
But, if you need a hoster with a lot of dedicated staff ready to jump for a few days to do special services for your hosting, then I do recommend looking for another hoster that only does hosting and specializes on *dedicated* *managed* hosting. Which is another price range too.
Hope that clarifies the expectations and our focus