ATT / Bellsouth Email Feedback Loop

Wade Peacock wade.peacock at
Thu Feb 25 17:07:16 UTC 2010

I figure I should follow up with a sample error message from our logs:

<xxxxxxxx at>: host[] refused to
    talk to me: 550- blocked by ldap:ou=rblmx,dc=att,dc=net 550
    Error - Blocked for abuse. See

Wade Peacock

On 02/25/2010 08:00 AM, Wade Peacock wrote:
> Greetings Brain Trust,
> We have found ATT to be heavy handed with their email (spam) filtering.
> Without warn all of our mail servers will be denied from delivering
> email to their many domains (,, etc). They have a
> removal request form (like most other large ISPs) which takes 2 days to
> process. We never find out why the we get listed. We always check as
> many "email" reputation systems and rbl searches to determine why.
> Everywhere we
> look we see no evidence of a problem. We have joined other ISP feedback
> look system, (AOL, Yahoo and even Hotmail/Live) which all have helped
> stop issues (comprised accounts, bots, etc) before they get to the point
> of a listing/block.
> I have searched and I can not find out definitively whether ATT has or
> does not has a feedback loop system. Anyone out there know?

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