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1 Message

Fri, Oct 26, 2018 8:55 PM

Delist/Unblock IP Address

Dear AT&T Postmaster, 


Our company tries to send emails to users with ids using, However, we have observed that the same are not being delivered. 


IP address used for email communication is
Could you please help me to check whether my IP is Whitelisted and assist me further in solving the issue ? I have repeated tried to email but have never received any response from them. 
Please advise and help. 
Thank you. 


Accepted Solution

Official Solution

Brand User

New Member


121.2K Messages

2 years ago

Hi @mastscove


Thank you for reaching out! The Postmaster website is the best way to help you find out whether or not your IP address is still blacklisted. There was a glitch that caused messages to not get through to them, but that should be fixed by now. Try sending your message again. Just be aware that it will likely take a while for them to get back to you.


If you need assistance with anything else, just let us know!


Aminah, AT&T Community Specialist

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