<VV> Blacklisted?

[airvair]

Someone - HELP!

I just sent Harry & Mike an email, and got the below kicked back at me.
Since I'm not a computer geek, could someone please explain to me in
plain English what just happened? Thanks.

-Mark

Subject: 
        Undelivered Mail Returned to Sender
   Date: 
        Wed, 5 Apr 2006 13:31:20 -0400 (EDT)
   From: 
        MAILER-DAEMON at out4.mx.nwbl.wi.voyager.net (Mail Delivery System)
     To: 
        airvair at richnet.net




This is the Postfix program at host out4.mx.klmz.mi.voyager.net.

I'm sorry to have to inform you that your message could not be
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                        The Postfix program

<hljensen at comcast.net>: host gateway-s.comcast.net[204.127.202.26] said:
    550-207.89.252.199 blocked by ldap:ou=rblmx,dc=comcast,dc=net 550
Blocked
    for abuse.  Please send blacklist removal requests to
    blacklist_comcastnet at cable.comcast.com - Be sure to include your
mail
    server IP ADDRESS. (in reply to MAIL FROM command)



_____________________________________________________
This message scanned for viruses by CoreComm




Reporting-MTA: dns; out4.mx.klmz.mi.voyager.net
X-Postfix-Queue-ID: 61CD9C2D2C
X-Postfix-Sender: rfc822; airvair at richnet.net
Arrival-Date: Wed,  5 Apr 2006 13:30:36 -0400 (EDT)

Final-Recipient: rfc822; hljensen at comcast.net
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host gateway-s.comcast.net[204.127.202.26]
said:
    550-207.89.252.199 blocked by ldap:ou=rblmx,dc=comcast,dc=net 550
Blocked
    for abuse.  Please send blacklist removal requests to
    blacklist_comcastnet at cable.comcast.com - Be sure to include your
mail
    server IP ADDRESS. (in reply to MAIL FROM command)