Forum Discussion
AmityWeb2021
Dec 22, 2021Copper Contributor
Trying to find help for 550 5.7.511 Access denied, banned sender
I run a mail server for many business clients of mine. Microsoft have blocked our IP address, so we cant send to Office365 email addresses. I get a bounce back saying: host cr-studio.mail.protec...
bootah
Dec 25, 2021Copper Contributor
Having same issue for the past 7 days. I took a new server in a different data center and moved some of the accounts over to the new server, but that did not resolve the issue, still blocked and banned from sending to office365 users. Been in the loop many times by sending emails, or filling forms for microsoft support, but I am not receiving any useful info. After delisting, I get a message that our IP is not blacklisted, so why aren't our emails working?
Anyone with a solution, please help.
Anyone with a solution, please help.
- AdvUserAdminDec 27, 2021Copper ContributorWe are having the same problem since 22 December. This needs to be resolved.