There is no good outage. But, it is great to see that when their portal/admin/webmail is down, DNS, SMTP, IMAP/POP3, SSL, Network is not affected by this.
Perhaps it's an HTTP-based redirect, and that's why it's down whereas DNS is up?
It is similar how the web interface for email has technically nothing to do with the email infrastructure and email protocols, but as a service it is packaged together with email.