degraded state

On December, 7 2017, was blocked by because of a misbehaving client. Clients such as Microsoft Outlook, Mozilla Thunderbird, Apple Mail, iOS Mail, Android Mail, and others that use as their Outgoing Server for sending email may receive an error when sending to email addresses that end in Enterprise IT is currently working with to resolve this issue.

More information: degraded state

Story added 7. December 2017, content source with full text you can find at link above.