Hey Nick, thanks for the reply.

Well, I have a ClearOS server at work I use for a utility server only. This is domain renncoautomation.us. I run a bare bones website on it to share videos and allow file transfers. This is through a Joomla website in my webroot (i.e. /var/www/html). That seems to have always worked when sending and receiving emails, although the only emailing really is what is sent from the Joomla website I created. I have a Kopano server and SMTP server running on it, but again, I really don't do any emailing. I was using the Kopano webapp to send the test email to check-auth@verifier.port25.com.

I then have a virtual website (in /var/www/virtual/livinggraceevangelical.church/html) where I have a Joomla website for our church. In the backend administrator configuration of this Joomla site, I have in the Joomla mail settings office@lgechurch.email as the 'from' and 'reply to' email addresses when Joomla sends out emails. The two domains used for the church are hosted through Google. The renncoautomation.us domain is hosted through Clear Center.

I have been making some DNS settings in Clear Center, but most of them are in Google Domains for the two church domains. I have placed a TXT entry for the DKIM key in both hosts' DNS records. In Google I use YYYYMM._domainkey.renncoautomation.us and in Clear Center I use just YYYYMM_domainkey for the name entry. I would think, since the emails are being sent from the Joomla site on the virtual website (i.e. /var/www/virtual/livinggraceevangelical.church/html), through my renncautomation.us smtp server, that this would be doing the signing, especially since I just installed and configured OpenDKIM on my ClearOS server.

This is all mostly Greek to me, so it's become a real stumbling block to making our church's website as effective as I want.