Resolved -
The issue has been resolved.
Jan 9, 10:41 GMT
Update -
We have successfully minimised the disruption and are working to completely resolve it as soon as possible.
Jan 8, 16:58 GMT
Identified -
Some emails sent to Microsoft-hosted email addresses may be rejected due to Microsoft blocking some of our IP addresses.
We are in contact with Microsoft to request de-listing.
Please accept our apologies for any inconvenience you may be experiencing.
Jan 7, 11:47 GMT