Black listed domain

Hi When a user at my work tries to send a email to a certain business domain he gets this bounce back:

SMTP error from remote mail server after initial connection:
    host mx2.hain-celestial.iphmx.com [68.232.137.96]:
    554-esa2.hain-celestial.iphmx.com
    554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means.


Can someone advise how to solve this issue? Do we need to contact the business we are trying to email?
tike55Asked:
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Thomas GrassiSystems AdministratorCommented:
Go to this site to see if the site is blacklisted

http://mxtoolbox.com/blacklists.aspx
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Randy PooleCommented:
Yes you do, they can whitelist your domain.  Also run your mailserver's IP and your domain against the following page:
http://mxtoolbox.com/blacklists.aspx
Also make sure your mail server's IP has reverse pointer setup you can verify that here:
http://mxtoolbox.com/ReverseLookup.aspx?gclid=Cj0KEQjwxZieBRDegZuj9rzLt_ABEiQASqRd-sNvw5hR4yLYMa0WmMOpXlFf_NwXAPPh5GWAqX11r84aAmCK8P8HAQ
Finally, make sure you have a valid SPF record to make sure only the correct servers can send on your behalf.
http://mxtoolbox.com/spf.aspx
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scott_edstromCommented:
Make sure you are SMTP relay is not enabled.  I have seen clients blacklisted for having this enabled or not configured properly
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