How to indicate to users that an email-only domain is active? [closed]

I use a domain name with no website attached to it for all of my personal emails, i.e. it only has MX/TXT records, and no A/CNAME ones. I’ve had a couple of instances in the past where people thought that I gave them a wrong email address because they tried typing my domain into their browser and, naturally, it didn’t resolve.

So I’m thinking of putting together a simple HTML page and pointing the domain to it for the sole purpose of indicating to those people that the domain is indeed active. However, I’m struggling with what that page should say and look like. What would you do if you were me? Thanks!