Delisting an IP address, not getting a response

Question

I have tried 3 times going to https://sender.office.com to delist an IP address, filled out the form 3 times. Each time using a different email address at the same domain and waited for the email to come in to validate the address but never received an email back.

If anyone has any suggestions or something else to try, please let me know.

Thank you,

Mike

Answer 1

If you have not received a response after multiple attempts to delist your IP address using the Office 365 Anti-Spam IP Delist Portal, here are a few suggestions:

1. Check Spam/Junk Folder: Ensure that the validation emails are not being filtered into your spam or junk email folder.
2. Use a Different Email Address: Although you have tried different email addresses, ensure that they are valid and accessible. Sometimes, using a different domain might yield better results.
3. Contact Microsoft Support: If you continue to experience issues, it may be beneficial to have the Microsoft 365 recipient contact Microsoft Support on your behalf. External senders typically cannot open support tickets directly, but the recipient may be able to assist.
4. Verify IP Address: Double-check that the IP address you are trying to delist is correct and that it was indeed blocked due to the reasons you believe.
5. Wait for a Response: Sometimes, it may take longer than expected to receive a response. Be patient and allow some time before trying again.

If you still do not receive any communication, consider reaching out through other support channels provided by Microsoft for further assistance.

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References:

• External senders - Use the delist portal to remove yourself from the blocked senders list and address 5.7.511 Access denied errors
• Microsoft 365 services for external email senders

Answer 2

One of the responses finally showed up hours later, but I got it.