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2 Messages

Fri, Jun 8, 2018 7:15 PM

Requesting blacklist Removal

Some of our mail servers are being blacklisted from sending mail to We have sent in the removal request to multiple times but have not heard back. Can someone take a look and help get us removed from the blacklist? More information below:

Blacklisted IPs: To be provided in a private message

Recipient: To be provided in a private message

Samples of messages we are receiving:
553 5.3.0 alph162 DNSBL:RBL 521< IP HERE >_is_blocked.For assistance
forward this email to

553 5.3.0 alpd678 DNSBL:RBL 521_is_blocked.For assistance
forward this email to

Thank you.


Accepted Solution

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Brand User

Community Support


136.4K Messages

2 years ago

Greetings @ksloan,

This is Jason, from the Community and Forums Team. Thank you for reaching out to the community! I would be happy to share some information on this subject.

Please follow this link which provides detailed information into your inquiry.

I appreciate your time!

Jason, AT&T Community Specialist

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2 Messages

2 years ago

We followed the removal guide with no luck. Please have someone look into this.

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