On 07/25/11 18:44,HIDDEN@mayfieldmastering.com wrote:
> Looks like an SPF issue where the IP address is not on the allowed list.
>
>
> On Monday 25/07/2011 at 6:09 pm, Wayne Gregor wrote:
>> I received this message that has some reference to SPF..... any help
>> will be appreciated....
>>
>>
>>
>>
>> When trying to deliver your message, the mail server at
>> host=ubuntuMaster.sfnet.com/sfnet.com,from=mail.sfnet.com encountered
>> problems with the following addresses:
>>
>> For HIDDEN@david-mcdermott.com>, Site david-mcdermott.com
>> (216.69.186.201) before data sent: 550 5.7.1 SPF unauthorized mail is
>> prohibited.
>>
>> For a more detailed explanation see
>> http://netwinsite.com/surgemail/deliver_failed.htm
>> <http://netwinsite.com/surgemail/deliver_failed.htm>
>>
>> --
>> *Wayne Gregori*
>> Office: 510-895-1066
>> Cell: 510-219-3887
>>HIDDEN@et.com
>

In order to troubleshoot this, you would have to know what the From 
address is and look up the SPF records for that domain in DNS.

The email server for david-mcdermott.com is rejecting based on SPF records.

Lyle Giese
LCR Computer Services, Inc.