Email Delivery Issue to Microsoft Email Services

As of August 7 we have not seen a re-occurrence of the email delivery issues and no messages are queuing. We have confirmed service is fully restored. This incident is now resolved.

We are no longer seeing throttling when delivering emails to other Microsoft Email Services, internal tests have also confirmed that rate-limiting from Microsoft is no longer present.

We continue to closely monitor email traffic to ensure the service is fully restored and there is no longer an impact to customers.

We continue to experience throttled connections when delivering emails to other Microsoft Email Services.

Our engineering team is continuing to work with Microsoft. We will provide our next update on August 6, 2018, at 14:00 UTC or as new information becomes available.

In partnership, we request affected customers to open a case directly with Microsoft and request rate-limiting to be removed as well as the IP range to be added in global white-list.

We continue to experience throttled connections when delivering emails to other Microsoft Email Services.

Our engineering team is continuing to work with Microsoft. We will provide further updates as new information becomes available.

We are continuing to work closely with Microsoft to address the situation. As stated earlier the issues experienced with O365 have been resolved however we continue to see throttled connections when delivering emails to other Microsoft Email Services. We will provide further updates as new information is available.

In partnership, we request affected customers to open a case directly with Microsoft and request rate-limiting to be removed as well as the IP range to be added in global white-list.

We continue to work closely with Microsoft to address the situation. As of today, at 07:00 UTC, we are no longer experiencing issues delivering emails to Microsoft Office 365 users. We continue to see throttled connections when delivering emails to other Microsoft Email Services. We will provide further updates as new information is available.

In partnership, we request affected customers to open a case directly with Microsoft and request rate-limiting to be removed as well as the IP range to be added in global white-list.

We are continuing to work closely with Microsoft to address the situation, our engineers are focused and prioritized on quick resolution. We will provide further updates as new information is discovered.

In partnership, we are requesting affected customers to open a case directly with Microsoft and request rate-limiting to be removed as well as the IP range to be added in global white-list. Customers are also encouraged to white-list Symantec IPs using Microsoft Office 365 solution.

We are currently experiencing issues delivering emails to a small subset of customers using Microsoft email services. The result is that emails are queued for delivery.

We are working with Microsoft to address the situation. We are requesting affected customers to open a case directly with Microsoft and request rate-limiting to be removed as well as the IP range to be added in global white-list.

Symantec will continue to hold emails based on standard and custom retry email schedules configured by our customers. We will provide further updates once we have more information from Microsoft.