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...
Are all of your servers facing this problem hosted on Linode? Ours are.... If so, please submit a ticket to the friendly people at Linode too. I hope that if there are enough tickets they will reach to MS at a higher level that they currently have and it gets solved quicker
No my other linodes are sending mail via a php script to Microsoft ok. It’s just this one linode server I use for email accounts.