Mail from field, or similar Plone 6 Classic

I just installed collective.contentrules.mailfromfield in Plone 6 (but it did not send email).

As far as I know, the only difference between this add on is the ability to send email to an address taken from 'some field'.

Is it possible to add 'some_fields' to the variables in the 'Mailer Content Rule' instead?

For example, we can now use: ${user_email}
What does it take to define: ${some_email_field} or ${context/some_field} or ${somefield/getEmail}

UPDATE: I see that I hardcoded this some time ago (but I never got the job where I was supposed to use it) Collective.contentrules.mailtogroup : 'send' field