It seems to be working now. Not sure if there was a cache issue with other plugins or changes I was attempting or the fact that I changed the email from “name”@”domain.com” where real email is managed through Outlook to wordpress@”domain.net” where this internal site lives.
Could the issue have been the .com vs the .net? I did try some SMPT plugins to use the .com email. The first was WP Mail SMTP which was configured to the Outlook server. The mail was being delivered but with a warning related to the .com/.net source. I disabled this as I did not want to alarm people with this warning.
The second was Post SMTP recommended by the Plugin. This plugin gave an error delivering the mail. It generated 5 emails log information.
Any insight to what I have said would be welcome reading. Thank you for your plugin!