NDR - # 5.3.0 smtp; 553 5.3.0

my ussers cannot deliver to sbcglobal.net or prodigy.net

NDR generated to recipients saying..

Your message did not reach some or all of the intended recipients.
Subject:  blank
Sent: date & time
The following recipient(s) cannot be reached:
user@sbcglobal.ent on such date & time

The message cannot be delivered due to a configuration error on the server.
Please contact your Administrator

<mydomain  #5.3.0 smtp; 553 5.3.0 flpi095 - m99l6vr30128001, DNSBL :521<208.70.119.240 >_blocked. _For information_see_http://att.net/blocks >

when checking this code with att.net.. I did not see the match. Please help.

We only filter incoming mails. .
myinzuAsked:
Who is Participating?

Improve company productivity with a Business Account.Sign Up

x
 
BertlingConnect With a Mentor Commented:
look like your on a spam blacklist.
please check you RDNS records at www.mxtoolbox.com

also read this and make sure it applys correct to your server: http://www.amset.info/exchange/dnsconfig.asp
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.