Stefano
What I have done for myself already…
A newsletter is ready to go, so I press the Next button and see options like to choose mail list and other stuff. I added four fields, the same as on the “Settings->General Settings” – Sender email address, Sender name, Return path, Reply to. The fields are pre-filled with name and email address from my WP-profile. Now, when I send an email, it goes from my name. The plugin.php extracts those details from the email and uses for sender details.
But, what would be really great, if you would add an option where to get prefills from, like a toggle box “Main settings – User profile – Custom”. Or even to choose details of other WP-users or a list of “Senders” with details required.
As for myself, it would add usability. But, of course, other plugin users may want something different.
Thank you!
Regards, Sergey