How Do I Verify A Reply To Address when setting up an email template?

How Do I Verify A Reply To Address when setting up an email template?

I created an email template to use with Leads in CRM. When I tested it by sending it to myself, I got an error message saying I needed to Verify the Reply To Address and no additional instructions were given. The Reply To I set up was my assistant using the same domain as myself which are both hosted by Zoho and have been for some time now.