For some users, the automatic setup doesn't recognise the GMail settings, for most, it does. We are still investigating this.
If it doesn't recognise your GMail account, you can still manually set it up, here's a perfect tutorial from Google: https://support.google.com/mail/troubleshooter/1668960?hl=en#ts=1665018,1665142
For some users, this didn't work, and we found out together, that 2-step verification may have been switched on: http://www.google.com/landing/2step/
If you have two-step verification, then you'll need an extra password for mailbe.at (this is part of the two step process from Google, not a mailbe.at "feature"), here's how: https://support.google.com/accounts/answer/185833
If it still doesn't work, please file a bug report here . We will try to help as fast as we can.
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