Is it possible to make Thunderbird behave like;
At new message window, leaving the From [account@provider.domain] blank?
Empty From [ ]?
To force me to choose which email account to be used to send the letter every time?
PS. I hope there could be a solution for this in the Config Editor or maybe editing some file with text editor. I just don’t know how or how to google for this specific solution.
Also, I’m prepared for an unofficial change like this could turn the “reply” to behave like this too, but I don’t mind that.
If it changed only the new message and leave the reply work just as before that better of course.
Thank you in advance for any attempt to help me in this. 
♂