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Re: [ietf-smtp] Public Key Look Up

Valdis Kl ē tnieks <valdis.kletnieks@vt.edu> Wed, 12 May 2021 16:31 UTC

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Sender: Valdis Kletnieks <valdis@vt.edu>
From: Valdis Kl=?utf-8?Q?=c4=93?=tnieks <valdis.kletnieks@vt.edu>
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To: Alessandro Vesely <vesely@tana.it>
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Date: Wed, 12 May 2021 12:31:01 -0400
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Subject: Re: [ietf-smtp] Public Key Look Up
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On Wed, 12 May 2021 12:09:28 +0200, Alessandro Vesely said:

> >> Personally, as a passive-aggressive mail system operator, the
> >> only keys my MX would publish would be proxy ones that let my
> >> MTA decode the mail and do spam and malware filtering.
>
>
> I was talking about /public/ keys.

Right.  Your MX publishes a public key to which it has the corresponding
private key.  This is well understood technology - see any company that
intercepts https:// and re-encrypts the user-side traffic using their own keys.

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