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Delivery to Office 365 Issue

December 11, 2025

11th Dec 2025 11:00am : We are aware of an issue delivering emails from our Spam Scanning System to some Office 365 Servers. While some Microsoft servers are accepting emails normally, others are deferring connections, resulting in delays to email delivery. We are working to see can the issue be resolved.

We would recommend you update your DNS MX record to deliver to Office 365 directly if this is service affecting for you.

Update 14:28:

We are seeing some issues with delivery to Office 365 today, some server are accepting emails no problem, and some are deferring delivery.

We have reports that setting up a Connector in the Exchange admin centre helps delivery, so I would say try that.

  • Go the Exchange Admin
  • under MailFlow, add a new Connector
  • Pick Connection From: Partner Organisation -> NEXT
  • give it a name EG: Elive -> NEXT
  • Select ‘By Verifying that the IP address… ‘, Enter 91.223.9.0/24 in the box and press the Blue Plus button ->NEXT
  • Untick ‘Reject email messages if they aren’t sent over TLS’ -> NEXT
  • Click Create Connector

Emails should start delivering shortly after, give it about 10 mins

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