Send emails only from allowed senders and replace From with Sender in Forms

[SegiNyn]

No description provided.

[ThiefMaster]

Is it really necessary to change the APIs internally? At least what I had in mind was simply changing the logic in the emails module to determine how to use From and Reply-to and only changing the form label in the various other places...

Also, I think we agreed to "name via Indico" <noreply...> in the From, and not using the site title in a very generic way.. Nevermind, that was just an early return where I saw that.

[SegiNyn]

Is it really necessary to change the APIs internally? At least what I had in mind was simply changing the logic in the emails module to determine how to use From and Reply-to and only changing the form label in the various other places...

I saw that you already had a function _rewrite_sender that makes changes to the From address that's why I removed that and added a new function. And I thought it was better to make the changes before creating the EmailMessage. Also, to be sure where in the emails module did you have in mind? do_send_email?

[SegiNyn]

The changes to the names to sender_address instead of from_address isn't actually necessary but it makes it obvious to developers as well not just the users as is the case if only the label is changed.