Make email message come from signer's name & email address not the site's?

Hi again Kreg.
I noticed that if the email feature is enabled (sending the signed petition to the target), the email message appears coming from the website, and the website’s name appear as the sender’s name.

Logically, it must be the signer’s email address, and his name (that he uses for signing the petition).
Imagine if it was a complaint signature addressed to the head of a company by his angry employees. He will mark all petitions coming to his email as spam, which will make the email provider blacklist the website’s domain or email address.

The solution is simply to have the signer’s details, not the website’s.

2- is there a way to use a variable in the “email subject” option, like the signer’s name, so that, if John Martin signs the petition, the email that gets sent to the target would have the signer’s name in its subject, like “complaint from John Martin” , instead of simply “complaint”?
If that’s possible, I would put this in the email subject option:
“Complaint From [NAME]” , and that would put the signer’s name in place of the variable [NAME], which would be great.

http://wordpress.org/extend/plugins/speakup-email-petitions/