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I recently received lots of junk email came from my friend's email address. But then I checked the email address with the associate ip address, I found out that it didn't come from my friend. Somebody faked the email address. How do I check to see if the email address is valid within the ip address to reject those mails. Thanks

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You could use "Caller ID", but only few mail servers support it yet. As it is a MS thing, is supporting it.

There is another thing, called SPF (Sender Polidy Framework), but KMS doesn't support it (yet).

You can of course always use black lists like or to block known spam IP addresses.

If the fake mail always comes from the same IP address (not very likely) you can block it manually with KMS.



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