How to Delist your IP from Microsoft Office 365 RBL

The following instructions explain how to remove an IP address from Microsofts Office 365's RBL.

1. Go to https://sender.office.com/
2. Enter your IP address and your email address. A confirmation email will be sent to this address so make sure it's a real email address you have access to.
3. Check your email and click the confirmation link within it.
4. All Done!

It's important that you figure out why you were blocked to begin with so that you are not blocked again. Make sure your mail server has not been compromised and ensure that your email queue does not contain any spam. We've seen administrators correct a compromised script but forget to clear their mail queue!