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New Member


2 Messages

Thursday, May 28th, 2020 2:42 PM

My IP address is blocked by AT&T

I have a mail server with a static IP that receives "5.3.0 flph834 DNSBL:ATTRBL 521< IP_x.x.x.x >_is_blocked. For assistance forward this error to" error message when sending email addresses.

Is there an alternative method to contact the abuse support besides the email ? I have send the email to that address and received no response. Could you please advice me, thanks in advance.

Accepted Solution

Official Solution

Community Support


225K Messages

4 years ago

We're happy to address your concern, @Naadiaa.


The abuse team at AT&T Post Master it the correct team to resolve your issue.


To submit a request to have your server removed from our blacklist, please email our Postmaster at


Thank you for reaching out to the AT&T Community Forums team.



If you need help with anything else, we'll be here.


Lafayette, AT&T Community Specialist

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