mail send from model : keep message in note

Hello,
while sending a mail from a model and asking for recording a note, you just get receiver adress and date, message generated by model is not recorded.

Is it possible to record message generated to keep plain trace of mail ?

More accurate, generating message from model before sending mail will be great. 
 
ie :Instead of generating message and sending, choosing a mail model will populate the message in the dialog, so we can read the message to ensure it is the right one before sending (and, by the way, the content will be saved exactly like non-generated ones).

Expect to be clear.

Regards,

Hello,
I think this is similar to that proposal .

Yes, that's exactly what i mean.

Thanks !