Email Security - Verify Sender
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Maryam82
100 pts.
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Q:
Email Security - Verify Sender
Exchange 2003, Exchange 2003 security, Exchange 2003 spam prevention, Spam prevention, Email authentication, Email security
An email was sent to some of our users and the sender appears to be one of our company’s users and he didn’t send it because it shows on our gateway filter. Emails between our company’s users are handled by exchange itself.
After checking the filter gateway the message ID = ….@filter.gateway.com
And accepted from unknown IP 69.20.5.219
Reverse DNS lookup is enable on filter gateway …
How can we prevent this from happening again?
Not to accept emails with our users emails in from field unless it was originated from the user himself.
ASKED: Mar 1 2009  1:07 PM GMT
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KDubb
80 pts.
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Implement "Sender Policy Framework". http://www.openspf.org/Introduction

You do take a performance hit though.
Last Answered: Mar 2 2009  5:23 PM GMT by KDubb   80 pts.
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