I found this website: https://mxtoolbox.com/domain/ helpful in mx error checking. However I’m not sure how accurate the error checking is. I ended up having to Google additional information.
Disabling “Use Socket For PHP-FPM” did the trick.
In addition to checking webmail to see the status of emails, you can also check your email delivery reports to see what error messages are being generated. For VPS Hosting they are found in WHM under “Email.” It will tell you whether your messages are going out. My reports showed a status of “Accepted” even though the mail did not reach the recipient.
For GoDaddy VPS hosting if you run into any issues beyond your level of expertise, it is hard to get any assistance. I have found limited assistance from their support documentation. They have a premium subscription service for WordPress but I only need a one time configuration of mail. I will have to keep calling until I find someone who can provide the proper assistance.
It is hard to believe there is no documentation or help text in the WHM dashboard that lets you know where to find configuration items or pages that contain default configuration settings.
I am unable to find where port 25 is configured and I am unable to find the section to check to see if my relay settings are set to open. I’ve gotten partial help that did not resolve my issue on a couple of occasions.
If they could put out a simple document on configuring email with the proper settings and where to enter them, that would help most of us who are experiencing these issues.
If I figure it out I will post what I find.