On 2011-05-30 3:35 PM, Steve wrote:
> 30 00:52:56[8975052] Failed 72.38.236.206 HIDDEN@mnsi.net>
> HIDDEN@snscomputing.com> 768 <1306731171_552517@surgemail.wavedirect.net>
> "[72.38.236.206] [Site snscomputing.com (72.167.238.201) before data sent:
> 550 5.7.1 SPF unauthorized mail is prohibited.] Please see

If you look at:
http://www.mxtoolbox.com/SuperTool.aspx?action=spf%3amnsi.net

it will show you the only IPs authorized to send mail from mnsi.net. If
the IP of your server (which seems to be 72.167.238.201) is not in that
list (they are all 216.8.x.x IPs), the SPF will fail.

-- 
Neil Herber