Add the ability to set the reply-to address on outgoing emails

Feature Request

Add the ability to set the reply-to address on outgoing emails.

Why would someone want to do that? Read this explanation here.

In a nutshell I am sending out emails to the store admin who will need to send information on to the email address associated with the order. If the reply-to address was set to the order email address all they would need to do is hit reply to send an email.

Would it be possible to add this functionality to this patch or should I open another issue for this? If you think that this would be possible in this patch change the Issue Title to "Add support for BCC and Reply-to addresses".

Thanks and God Bless!
Frederick

P.S. - Since my request to add in #1961366 Comment #8 ✨ Add support for CC and BCC Closed: outdated has not been acknowledged I create a new issue for this.