1715 BST / 0915 PST We are aware of ongoing issues with the Microsoft office 365, exchange online component.
All mail inbound to this service, from all destinations, is being refused by an issue with their infrastructure. This issue is unrelated to the LogicNow infrastructure.
All mail inbound to MaxMail will be queued, and retried until the issues with Exchange Online are resolved. Outbound mail to Office365 customers will be retried until it expires from the outbound queue.
Microsoft currently have posted no ETA to resolution