If you want the email of your recipient appear automatically depending on the selected signature in Outlook, you can add this id in the email tag in your signature:
<a href="mailto:daniel@xink.io" id="OWAAMA358A36770694C9FAB0D815D826A7426Z">@daniel</a>
Once you update your Outlook with this signature, the email 'daniel@xink.io' will be automatically added in the 'TO:' input field in your Outlook:
