2017-06-20 20:44 UTC: A networking issue in one of our US data centers is affecting incoming mail service and webmail logins for some customers. We’re working to restore service and will update this post when more information is available.

2017-06-20 20:59 UTC: Service has been restored – we’ll continue to monitor.

2017-06-21 14:36 UTC: There have been no further disruptions, and the data center confirms that the networking issue is resolved.