Dear Evelyn
Welcome to Microsoft Community.
According to your description, you received an email from Microsoft Alerts informing you of a blocked Outlook mailbox issue.
For this issue, I would like to ask if you are now able to log in and send emails normally through the web version of Outlook within your browser?
For this issue, due to Microsoft's privacy restrictions, community members do not have the tools or access to view and modify your mailbox and account information and settings. For this issue, I would suggest you to try to resolve this issue in the following ways:
Check the sender block list:
Make sure that you have not added important senders to the block list. You can view and edit the block list in Outlook settings.
Check Outlook Rules and Forwarding:
Make sure you haven't set any rules that will automatically block or delete emails, and also check in Outlook web version to see if you have enabled and forwarded emails to unrecognized addresses.
In the meantime, you can also follow the following ways to communicate with Microsoft's human customer service:
- Click the link.–Contact - Microsoft Support
- In the box under “We're here to help,” enter Outlook, click Get Directions, and then click Contact Customer Service. (You must be logged into your Microsoft account. If not, follow step )
- In this section, you need to sign in to your personal Microsoft account.
Note: You can only sign in with your personal MSA, when you sign in with your company account, it will not display correctly. If you are unable to connect to this account, you can use another account or create a new account to manage it.
- Under “Products and Services”, select “Other Products”, select “Outlook”, and then click Confirm.
- You can select “Chat with a Support Specialist in a Web Browser” and go to the chat window.
Note: Please contact us during local business hours on weekdays, CHAT is not available 24 hours a day.
Feel free to text back if you need further help.
Best wishes
Chris.S-MSFT | Microsoft Community Support Specialist