Custom Sender Address and Reply 1.0.0

Source Code License

Custom License

Parts from Flexible Identity version 1.0.4: GNU General Public License, version 3.0 
Parts from Reply as Original Recipient version 1.0: Mozilla Public License, version 2.0

All subsequent (my) changes:
Dual-licensed under both GNU General Public License version 3.0 and Mozilla Public License version 2.0