Email Campaigns - Increased soft bounces to Microsoft and iCloud recipients

Incident Report for CM.com

Resolved

We have made changes to our sending infrastructure and bounce rates have returned to normal levels. We apologize for the inconvenience.
Posted Oct 02, 2026 - 16:01 CEST

Investigating

We are investigating an issue where part of the email campaign traffic to Microsoft-hosted mailboxes (Outlook, Hotmail, Live, Microsoft 365) and iCloud mailboxes is being rejected, resulting in an increased number of bounces. Delivery to other email providers is not affected.
Posted Oct 02, 2026 - 14:57 CEST
This incident affected: Mobile Marketing Cloud (Email Campaigns).