Checking if email is valid

[Chris Angelico]

On Tue, 7 Nov 2023 at 07:10, Mats Wichmann via Python-list
<python-list at python.org> wrote:
> Suggests maybe labeling should be something like:
>
> * Number you want to be called on
> * Number for texted security messages, if different
>
> Never seen that, though :-)
>

My responses would be:

* Don't.
* That's what cryptographic keys are for.

:)

ChrisA