The incident is resolved as block rates at Microsoft 365 have returned to normal levels.
Users that continue to see elevated blocks at Microsoft 365 can submit delisting requests to Microsoft by sending an email with a copy of the error message, and the blocked IP address, to "delist@microsoft.com".
Delisting requests can also be made via the Office 365 Anti-Spam IP Delist Portal at https://sender.office.com/
Users that are experiencing blocks at Microsoft Outlook Consumer domains can open a remediation request at http://olcsupport.office.com/
The incident has been resolved and SMS delivery from Twilio to affected networks in multiple countries across the Middle East and Africa is operating normally.
The incident is resolved and block rates are back to normal but customers will see change in block classifications from Microsoft 365. Users that continue to see elevated blocks can submit delisting requests to Microsoft by sending an email with a copy of the error message, and the blocked IP address, to "delist@microsoft.com".
Delisting requests can also be made via the Office 365 Anti-Spam IP Delist Portal at https://sender.office.com/