Ability to set the replyTo without fussing the send of the email

[mfrederico]

I also have a pull request ready - that allows the replyTo to be different from the email sending authentication. This is especially useful for google where you may have an email alias to send from.

[BadChoice]

sounds like a really nice addition, if you can send it so I can review it and we can merge if everything is ok!

thank you!