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New Member

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2 Messages

Thursday, May 4th, 2023 7:14 AM

Emails From SendGrid IP Address Blocked

Hi,

Our application uses SendGrid with a dedicated IP address to send email addresses on behalf of our users. We've received the error message
REASON: 553 5.3.0 alph748 DNSBL:RBL 521< 159.183.109.35 >_is_blocked. For assistance forward this error to abuse_rbl@abuse-att.net
For following domains:

  1. @att.net
  2. @sbcglobal.net
  3. @ameritech.net
  4. @bellsouth.net

Administrator

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26.2K Messages

10 months ago

Have you emailed the RBL Address?  It typically takes 5-7 business days.

 

Chris
AT&T Business Social Media

Administrator

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26.2K Messages

10 months ago

Are you still having an issue?

 

Chris
AT&T Business Social Media

New Member

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2 Messages

10 months ago

Yes, I had sent an email, and have got a reply from them about it.

Seems like the issue is resolved, as no complaints received yet.

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