Not receiving emails

Question

i can send emails , but i cannot recive emails, message will appear to sender that email was not valid

Answer 1

Hi Nisael Garcia,

Welcome to Microsoft Q&A Forum!  

Have a good day and I hope you're doing well! 

I completely understand how inconvenient and worrying this can be for your work, especially when senders are receiving error messages stating your email is invalid.

Based on the error description, this behavior often points to an issue with your MX Records (DNS settings). These records act like a map that directs incoming mail to your inbox. If they are incorrect or missing, external servers won't be able to find your address. 

1. You can try using third-party DNS lookup tools to verify if your MX records are published and pointing to Microsoft 365 correctly. 
2. If you are unsure how to check this, please reply to the Private Message I sent you earlier and provide me with your Domain Name. I can then help you check the DNS propagation from my side to gather more insights and recommend the appropriate troubleshooting steps. 

This initial answer might not solve the problem completely right away. So, if you have any updates or more information, please feel free to let me know so we can find the right solution together. 

Looking forward to hearing from you. 

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Answer 2

how do i check does 3 steps

Answer 3

If you can send emails but are unable to receive them, and the sender receives a message indicating that the email address is not valid, there may be several potential issues to consider:

1. Recipient Validation: If you are using an Exchange Server, recipient validation might be enabled, which can cause messages to be rejected if the server cannot find the recipient. This can happen if the server is misconfigured or if there are issues with the recipient's address.
2. Firewall or DNS Configuration: Ensure that your firewall or external mail exchanger (MX) DNS records are correctly configured to direct emails to the appropriate server. If they are misconfigured, incoming emails may not reach your mailbox.
3. Active Directory Attributes: If your email address is inadvertently matched to an incorrect Active Directory attribute, it could lead to issues receiving emails. Check to see if there are any special characters in the email address or related attributes that could cause this problem.

To troubleshoot, you may want to check the configuration of your email server, verify your DNS settings, and ensure that your email address is correctly set up in your Active Directory.

If the problem persists, consider contacting your IT support or email service provider for further assistance.