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Re: [Nmh-workers] Emails being tagged as spam -- NMH solution???

From: Ken Hornstein
Subject: Re: [Nmh-workers] Emails being tagged as spam -- NMH solution???
Date: Mon, 02 Mar 2015 22:19:42 -0500

>There are three occurrences of the following, associated with
>Received: entries, in the header:
>     (No client certificate requested)
>I'm guessing that those are harmless.

Yeah, I suspect that's from a TLS connection between client and server, and
the client didn't provide a certificate which is normal.

>There's also an "spf=softfail" in there.
>     Authentication-Results: mx.google.com <http://mx.google.com>;
>            spf=softfail (google.com <http://google.com>: domain of 
> transitioning address@hidden <address@hidden> does not designate 
> as permitted sender) address@hidden <address@hidden>;
>            dkim=fail address@hidden <http://gmail.com>;
>            dmarc=fail (p=NONE dis=NONE) header.from=gmail.com 
> <http://gmail.com>
>Note that is smtp-grey.stanford.edu.

Huh.  I'd be interested in looking at the whole Received: header chain,
but maybe I don't understand what is going wrong; it almost seems like
smtp-grey.stanford.edu is the one originating the email and that doesn't
make sense to me, if you're submitting directly to gmail.  But yeah, I
suspect the failing SPF, DKIM, and DMARC tests is what is causing the

Okay, this header is actually defined in RFC 5451, see here:


But I am still puzzled.


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