7 Replies Latest reply on Nov 2, 2015 8:37 AM by Jason Scott

    Major bounce errors with sbcGlobal

    Jason Scott

      We have a lot of small business using domains sbcglobal.net, which is now part of AT&T.  We are having issues with emails getting through.  It doesn't matter the email content or from address.  They always hard bounce with the error code "553 5.3.0 flph399 DNSBL:RBL 521< XXX.XXX.XXX.XXX >_is_blocked.__For_information_see_http://att.net/blocks".  Obviously they are getting blocked.  We've limited sending to sbcglobal email address to only-as-needed basis.  Had them send an email to us then reply using the outlook plugin so the reply came from our marketo server, which has a dedicated IP.  We can send emails without issue through our outlook server.


      Have you had issues with sbcglobal?  What did you do to fix it?