Please add support for Reply-To

```
Its more of a Request.

In my case I want to have option to add a different Reply-To email, which is 
not same as from email. So when receiver gets the email and want to reply, it 
will reply to the "Reply-To" email instead of from email.


```

Original issue reported on code.google.com by `abdullah...@gmail.com` on 8 Feb 2013 at 2:57
