Arthur S. Alexion on 22 Mar 2004 21:30:03 -0000


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Re: [PLUG] Re: SPF


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On Sunday 21 March 2004 07:17 pm, Walt Mankowski wrote:
> You're confusing the envelope sender with the From: address.  SPF only
> protects the *envelope*.  In fact, it doesn't even look at the message
> itself, only the envelope.  You can set your From: address to anything
> you want, so long as an authorized host is given as the "Mail From:"
> domain in the SMTP envelope.
>
>
> If you're on a Comcast cable modem, for instance, it's perfectly legal
> to relay through their SMTP server but with a From: address of
> iglou.com.  The recipient's SMTP server will see the mail as coming
> from "jeffm@comcast.net", but that'll be ok because it will be coming
> from a Comcast SMTP server which they'll have authorized as being
> allowed to send Comcast mail.  But that's all just protocol.  When the
> recipient gets the mail, they'll just see "From: jeffm@iglou.com".
>
>
> This is all explained quite clearly in the Linux Journal article.

Now I understand why it won't cause problems for ¨personal domains¨.

- -- 

_______________________________________
Art Alexion
Arthur S. Alexion LLC
arthur [at] alexion [dot] com
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