Hi all,

would anyone on this list be interested in inventing a triple opt-in protocol? If you would participate to such experiment, hit that reply button now!

This opt-in method is for newsletters and mailing lists alike. The idea is that when, say, us...@example.org subscribes to tri...@lists.example.net, the latter notifies example.org servers of the subscription to the relevant message stream. "Triple" refers to the three parties involved. The new protocol would allow both web-based and email-based confirmation, but they can optionally be carried out directly by the subscriber's server, example.org.

*Advantage for users* confirm subscription and destination folder with one click.

*Advantage for list managers* obtain opt-in evidence, e.g. PGP-signed by the user's server.

*Advantage for mail servers* reliably reckon positive domain reputation as opt-in abidance.

Yes, it is assumed that those message streams are DKIM signed. As it seems that ESPs are among the early adopters of DKIM, these messages may eventually involve a decent percentage of the mail flow.

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