M365 email issue

I found user1@example.com can't receive any email, only user1@xxxx.onmicrosoft.com can receive emails.

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Have you added an MX record?

When you set up your MX records. That way, you’ll continue to receive email. When you update your domain's MX record, all new email for anyone who uses your domain will now come to Microsoft 365.

You may refer to the article under "Add an MX record for email (Outlook, Exchange Online)": https://video2.skills-academy.com/en-us/microsoft-365/admin/get-help-with-domains/create-dns-records-at-any-dns-hosting-provider?view=o365-worldwide#related-content

Hello, @James Chan_110,

Welcome to the Microsoft Q&A platform!

Based on your description, I understand that you are unable to receive any emails in your new account after modifying your domain, while your account before the modification can receive emails normally.

It sounds like you have successfully changed the domain name of your account, but you have not fully configured the email routing for the new domain, which may be why you are not receiving emails in your new account. Here are some steps you can take to ensure user1@example.com receives emails:

1.Verify Domain in Microsoft 365: Ensure that your domain (example.com) is verified in Microsoft 365 Admin Center.

2.Update DNS Records: In a new browser tab or window, sign in to your DNS hosting provider, and find where you manage your DNS settings.

(For more information about how to verify domain and update DNS records, please click on Add DNS records to connect your domain - Microsoft 365 admin | Microsoft Learn for reference.

3.Update Email Addresses: Ensure the primary email address is set to user1@example.com in M365.

4.Check Email Settings: Check under "Mail flow" > "Rules" and "Connectors" to ensure there are no rules or configurations blocking emails to user1@example.com in EAC.

After making these changes, test the email delivery to user1@example.com. You should be able to receive emails normally at this time.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Thank you for your support and understanding.

Best Wishes,

Alex Zhang

Hi James Chan_110,

In addition to NoOneCan, please check MX records are correctly updated or not.

This is an issue look like with the email routing or configuration for your custom domain. Here are a few steps you can take to troubleshoot and resolve this issue:

Verify DNS Settings: Ensure that the DNS records for your custom domain (example.com) are correctly configured. You need to have the appropriate MX records set up to route emails to your mail server.

Check Email Aliases: Make sure that user1@example.com is properly set up as an alias for user1@xxxx.onmicrosoft.com. This can be done in the Microsoft 365 admin center.

Update Email Routing: If you are using Microsoft 365, ensure that the email routing rules are correctly configured to handle emails for your custom domain.

1. Test Email Flow: Send a test email to user1@example.com and check the email logs to see if there are any errors or issues that might be causing the email delivery failure.

If you have any additional questions, please let us know in the comments. We’re happy to assist further. 

If you found the answer helpful, please click on Upvote and Accept Answer. This will help other community members.