NSSharingService: setting 'reply-to'.

Hi,


I've managed to set up a mechanism for sending an email with NSSharingService from my Swift-code app but I was wondering if it is possible to set the 'reply-to' field in the constructed email? I have 2 regularly used email accounts and sometimes Mail defaults to the one I don't want; yes, I can change it prior to clicking Send but it would be good for any app user to be able to specify which address generates an email.


Thanks,


Todd.