Managing personal Outlook.com account settings, security, and privacy
@Michael Kay said
removing blocked senders and domains and/or adding them as safe ... an error unable to save
If you only need to get an email off your Blocked list, or add to Safe, but can't save changes:
Possible Workaround - Add to Contacts. See the Answer by "Hornblower409 Sep 5 2026" in
https://learn.microsoft.com/en-us/answers/questions/5989552/couldnt-save-changes-when-unblocking-an-email