If you make a better webmail-client, make switching easy! Allow me to give your site a try with my current archive of (gmail) messages and contacts, and keep gm

If you make a better webmail-client, make switching easy! Allow me to give your site a try with my current archive of (gmail) messages and contacts, and keep gmail up-to-date, so I can switch back if I decide (and I'm a pessimist) that your service isn't good enough.