Spoofing seetings in exchange server 2010

To all,

To prevent spoofing we added  the folowing setting to the exchange server

Set-SenderFilterConfig -BlockedDomainsAndSubdomains atelxxxxx.xx  
now any mails send from outside the mail server with the domain xxxxxxx = blocked.
I need to add one exception for this rule menaing that one emailadres info@xxxxxxx  that is used for sending newsletters from an external mail cms software should be pas this filter settings. can anybody tell me how to do this?

tnx,
ITateljeeAsked:
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Scott CSenior EngineerCommented:
This will allow you to add one user for your exception.

$item = (Get-ContentFilterConfig).BypassedSenders
$item.add("address@contoso.com")
Set-ContentFilterConfig -BypassedSenders $item

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Scott CSenior EngineerCommented:
Answer given should resolve issue.
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