Hi, I have voicemail server (Shoretel) and Office 365. The voicemail server sends out email just fine until recently. i got bad mail showing up as below:
Diagnostic-Code: smtp;550 5.7.606 Access denied, banned sending IP [xxx.xx.xxx.x]. To request removal from this list please visit https://sender.office.com/
and follow the directions. For more information please go to http://go.microsoft.com/fwlink/?LinkID=526655
I called shoretel, but they couldn't help. MS Office haven't answered. I submit the delist but doesn't help: I got below reply:
Please note that your ticket number is in the subject line of this mail.
Note: Errors are unlikely, however, if an error is indicated, please resubmit the specific IP or IP range.
Outlook.com Deliverability Support