In the early hours of Saturday 17th June we'll be performing an upgrade to our Webmail system. We're upgrading to the latest version of Roundcube Webmail, which powers our system, and have been working over the past month to ensure that our address book and task list enhancements will work correctly after the upgrade. Webmail will be inaccessible from 00:01 to 00:30 on Saturday 17th June...