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Protect yourself online
S

New Member

 • 

2 Messages

Tuesday, November 24th, 2020 5:16 PM

553 5.3.0 flpd588 DNSBL:RBL 521

Hello,

It appears that our corporate mail server is being blocked by att.net;

host ff-ip4-mx-vip1.prodigy.net[144.160.159.21]
   said: 553 5.3.0 flpd588 DNSBL:RBL 521< 24.242.133.74 >_is_blocked.For
   assistance forward this error to abuse_rbl@abuse-att.net (in reply to MAIL
   FROM command)

I submitted a request to be unblocked Saturday night (62hrs ago), but haven't heard an update yet.  As of last report, emails are still being blocked.

What can I do to alleviate this situation?

Thank you,

Shane Chambers

New Member

 • 

2 Messages

3 years ago

Resolved.  Thank you!

Community Support

 • 

231.4K Messages

3 years ago

Awesome, @shc_countyline.

Glad to hear that your email concern is resolved! Please feel free to reach out to us here, for any future needs or concerns. We're always here to assist you.

Thanks for choosing AT&T!



Yetty, AT&T Community Specialist

New Member

 • 

4 Messages

3 years ago

We are having the same issue.

I have also submitted an email to abuse_rbl@abuse-att.net a couple of times over the last 2 weeks without a response other than the "thank you we received...." email.

host ff-ip4-mx-vip2.prodigy.net[144.160.159.22] said:
553 5.3.0 flpd596 DNSBL:ATTRBL 521< 72.236.255.162 >_is_blocked.For
assistance forward this error to abuse_rbl@abuse-att.net (in reply to MAIL
FROM command)

The IP is totally clean for years. It's weird this started up.

It's blocking transactional receipts for orders.

Anyone we can contact beside the abuse email address?

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