How to set up a Roundcube mail server?

Question

Roundcube

Guys, tell me how to set up roundcube in such a way that if I sent a letter to any subscriber, I would receive a notification that the letter reached him and was read?!

Answer 1

these are the flags in the letter "about delivery" and "about reading" somewhere in the settings.
now all mail clients do not respond to these flags; you will not receive these notifications unless the other party has specifically enabled this functionality.