By not using an email address (dialtone is a medium unto itself, just as much as snailmail, in-person, messaging and video links are and would require different security protocols).
I grew up reading Nerd Vittles (lurker shoutout to Ward) and think dialtone is sexy, but the digital version of "don't call me, I'll call you" will most likely not include email (or inbound messaging).
{Sidenote: I also worked in deploying cable broadband around Y2K and taking a small percentage of the phone companies business was a big chunk at the time. The dialtone wars will not stop at LTE, but should find a new avenue with SAT dialtone. Its going to be another big chunk (no citation).}
I grew up reading Nerd Vittles (lurker shoutout to Ward) and think dialtone is sexy, but the digital version of "don't call me, I'll call you" will most likely not include email (or inbound messaging).
{Sidenote: I also worked in deploying cable broadband around Y2K and taking a small percentage of the phone companies business was a big chunk at the time. The dialtone wars will not stop at LTE, but should find a new avenue with SAT dialtone. Its going to be another big chunk (no citation).}