SPF, MTAs and SRS

Last month, we learned how to flag outgoing e-mail as authentic using DNS. Now, it's time to check incoming mail and protect our users from forged spam and worms.
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misconfigured sender

Anonymous's picture

I receive e-mails from things I subscribe to. And some things I don't. Today I received something from my credit card company. It was valid, had links to go to. But I always look at "view source" to see if it's from someone else who does tent to "play games" with me.
Here is what I saw on "view source" that is confusing me. And why does it have to be misconfigured? Here is it:

Received: from bigfootinteractive.com (arm-ei108.bigfootinteractive.com[216.33.63.108](misconfigured sender))