Forum Discussion
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...
9 days and Microsoft doesn't answered us... The problem persist and we can't do anything to resolve it =/
suportecw Microsoft have advised their servers currenly will not accept email from any Linode IP addresses....
- Could you explain this a bit more please? Where did you get this info? My other Linode servers send email ok (using a PHP mail script).
