How to set Delivery Status Notification in Mozilla Thunderbird enabled by default?

Question

Email

There is a problem: in Mozilla Thunderbird I can’t find how to set the Delivery Status Notification option so that it is enabled by default. For those who don't know, the option is enabled for a new message in the Options menu when creating a new message. The meaning of the option (who does not know): to deliver to the sender (me, for example) a message that the letter was delivered to the recipient's mail server (it is very important when you need to be sure that the letter at least left me, and did not hang somewhere - or whatever happened to him).
Because this option should be used by several managers at once, then the question is generally very urgent. Do you know how to do it?

Answer 1

As a result, this set of options helped:
mail.dsn.always_request_on;true mail.dsn.request_never_on
;false
mail.dsn.request_on_delay_on;true
mail.dsn.request_on_failure_on;true
mail.dsn.request_on_success_on;true
mail.dsn.ret_full_on;true
will be seen, but I hope for the best!
Issue resolved.

Answer 2

Thunderbird->Settings->Advanced->General->Read receipts (button)->Always ask for read receipts when sending messages (tick)