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Exchange letting spoofed emails through

kesslerkare asked
Last Modified: 2015-09-02
I am running Exchange 2010 and we have a SPF record set including the exchange server's IP address. We are still getting spoofed incoming email and the header shows the following:

X-MS-Exchange-Organization-Antispam-Report: SenderOnRecipientSafeSendersList
X-MS-Exchange-Organization-SCL: -1
I have the SenderID enabled

Why does Exchange think this spoofed user is on the safe sender list when his originating IP does match our IP?
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