Sending, receiving, and organizing email in Outlook.com
Hello,
What is the exact error message the sender receives when they email your address?
- You can try sending a test email from one of your accounts to the affected email address and see whether you receive any bounce-back error message.
- Share the error message here.
Meanwhile,
Open an incognito tab and sign in with your Microsoft account here.
https://outlook.live.com/mail/0/options/accounts-category/storage
This will show you the total available space in your OneDrive and Outlook email. Also to confirm whether the Office 365 Subscription you purchased is reflected or not.
Share a screenshot of the page.