[CentOS] help with CBL spam rejection

Jerry Geis geisj at pagestation.com
Tue Nov 11 17:39:44 UTC 2008

I am getting this error:

   ----- Transcript of session follows -----
... while talking to mail-in.cbl.abuseat.org.:
 >>> DATA
<<< 550 HELO for IP was "unifiedpaging.messagenetsystems.com"
550 5.1.1 <helocheck at cbl.abuseat.org>... User unknown
<<< 503-All RCPT commands were rejected with this error:
<<< 503-HELO for IP was "unifiedpaging.messagenetsystems.com"
<<< 503 Valid RCPT command must precede DATA

when checking my outgoing mail from http://cbl.abuseat.org/helocheck.html

What am I supposed to change on my centos 5 system to no longer be on 
the CBL listing.
I have manually remove the entry but something needs to change so it 
doesnt get back the list again.

The FAQ's talk about windows not linux. What do I do to change sendmail?


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