Default sending email address

Is your feature request related to a problem? Please describe.

I am missing the option to set the default email address/account to use when composing a new email.

Let's take the case of a user who has several email accounts. With each new message, he must modify the sender's address if the order of the accounts is not correct.

The address used is that of the first email account displayed.
But in our case, the first email account to display (the most read) is not the one to use when sending a message.

Describe the solution you'd like

A general option in the Mail settings that allows user to define with a drop-down list the default sending address.

Describe alternatives you've considered

I am open to any alternative. Is it possible to define this default address (depending on each user) in a configuration file or in the database? This while waiting for better

Additional context

No response

The issue names no files, tests, or entry points. Start by locating the Mail settings and the new-message sender selection, then trace how the first displayed account is chosen. Done means a user can select a default sending address and new messages use it without manual changes.