Masked Email Ability?

If I were to set something like this up, I’d start by installing a contact plugin that can send emails to a specific address without letting the sender see it. I think Contact Form 7 can do this.

But that’s the easy part, because what you need to do now is set up some kind of link to use that will take the user to the contact form, and then the contact form sends the email to the correct address. What that link looks like depends on the contact form plugin you’re using.

For the Participants Database list to show your link, you need to set up a custom template. Create a field that will serve as the link to click on, then in your custom template, place the link to the contact form.

Using Participants Database Custom Templates

If this doesn’t make sense to you, you may need to get some expert help, it will be a bit technical getting this all set up.