Meckron

At least, that was enough to get the test mail to send using PHP code. Updating the actual address still fails. And one thing I left out as well that I just realized that probably makes a difference, this is also a multi-site install.

Testing mail via PHP works fine. Changed the main site admin mail to the new domain and still didn’t receive any mail. Changing any site mail supposedly generates a message but we’re not getting any of those messages either.

It was a hosting issue routing mail internally instead of externally.

I’m sure that everything is online as it’s my own system, it’s not hosted.

I’m using the built-in wizards to generate the wp-config.php file, so I can’t double check the settings in it because it hasn’t been created yet. If I do create it manually, I get a 500 error.