Re: DMARC from the perspective of the listadmin of a bunch of SMALL community lists

"John R Levine" <johnl@taugh.com> Fri, 25 April 2014 02:10 UTC

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Date: 24 Apr 2014 22:10:31 -0400
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From: "John R Levine" <johnl@taugh.com>
To: "Martin Rex" <mrex@sap.com>
Subject: Re: DMARC from the perspective of the listadmin of a bunch of SMALL community lists
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> SPAM filtering MUST be implemented as voluntary opt-in, otherwise it will be
> illegal, as you correctly notice.  Spam-filtering can only be legal when
> it is performed strictly on behalf of the recipient, the receipient is
> in full control over the behaviour all the time, and the blocking or
> deletion of any messages is performed with explicit and voluntary
> (i.e. condition-free) consent of the receipient himself.

If that were true, there would be no Gmail, Hotmail, or Yahoo mail users 
in Germany, since they offer only limited control over spam filtering, and 
some stuff, e.g. DNSBL blocks, is unconditional.

I expect that the mail systems make it a condition of subscription that 
the recipients consent to the mail system doing whatever it has to do to 
filter incoming mail.

Regards,
John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY
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