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Posted by Byron Hynes [MS] on October 19, 2005, 1:12 am
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If it's legitimate, some piece of software added its own custom header to
the email on the way along the SMTP path, probably to let administrators
track the process and tune the spam filtering.
If you know the mail is spam, it could have been added by the spammer to
make it look less like spam, which seems to be the current chat on newsgroups
and such.
So, my best guess would be it's a faked header to give the impression the
email passed a Bayesian spam filter.
Byron Hynes
Windows Server
Microsoft Corporation
http://spaces.msn.com/members/byronphynes
> Anyone know what the following means? Its from the header of an email.
>
> X-NAS-Validation:
>
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