I got the message too. Turns out, it’s the distinction between the form and the mail routing.
On the Form, [your-email] is the form fillers address.
On the Mail tab, the settings are for Routing the mail. To is who you want the form data to go to and From is the address SENDing the form data. In this case, it’s not actually the person sending, it’s the web site. So From should match the server domain so it’s not seen by mail servers as spoofing or relaying.
In many cases, To and From will be the SAME on the Mail tab. Just tested this and it worked fine and now passes the new configuration checker.
Just be sure to put the From email address in brackets: <email>
Sample images in the Help pages are now out of date. They do show using [your-email] in the From. This is now a mistake.
More importantly, the change looses the From email address. So if you reply to the message, you end up replying to yourself. So now you ALSO need to add the following to Additional Headers:
Reply-To: [your-email]
It’s also a good idea to add a name to the From email address as that will carry forward in the correspondence and is better than “WordPress”.
The format is: Name <[email protected]>
This may seem a bunch of extra work but it does avoid your contact forms being seen as having spam-like qualities.