Having trouble recieving e-mails

Question

When my mother tries sending me an e-mail she is getting the message
"your message couldn't be delivered.The Domain Name System reported that the recipients domain does not exist. Contact the recipient by other means, by phone, for example, and ask them to tell their email admin it appears that their domain isn't properly registered at their domain registrar. It's likely that the recipients email
Admin is the only one who can fix this problem."

Any advice on how to fix this problem. Plenty of other mail does get through.

Answer 1

Outlook.com (hotmail) is not currently supported here on Q&A. The product group for Outlook.com actively monitors questions in dedicated forums here.
https://answers.microsoft.com/en-us/outlook_com/forum/oemail

If an account access problem then also try resetting via the account recovery form
https://support.microsoft.com/en-us/account-billing/help-with-the-microsoft-account-recovery-form-b19c02d1-a782-dee6-93c3-dc8113b20c42

--please don't forget to upvote and Accept as answer if the reply is helpful--