Sending, receiving, and organizing email in Outlook.com
First, please kindly check the AI answer since it has covered the Outlook.com filters, folders, rules, forwarding, and safe senders thoroughly.
Since this only appears to affect notifications from the healthcare portal, changing the contact email was a good troubleshooting test.
If messages begin arriving at the new address, contact the portal’s support team and ask them to check their delivery logs for the original Outlook.com address. Specifically, ask whether the missing notifications were generated and whether their mail system received a rejection or delivery error. Outlook.com cannot recover or locate a message that never reached Microsoft’s mail servers.
You should also confirm that your Microsoft cloud storage is not full, as a full storage allocation can prevent Outlook.com from receiving new messages.
When contacting either support team, avoid posting your email address, healthcare details, or copies of private portal notifications publicly.
Hope this helps. Have a great day