Re: [ietf-smtp] Public Key Look Up

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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