I have exhausted every option I can think of for setting up my remote mail server (G Suite), I’ve gotten support from Google, Cpanel and other sites with no help. Basically I have set up my Droplet from scratch (CentOS 7), configured my name servers, installed Cpanel/WHM, configured CSF firewall, installed an SSL certificate… literally all of those things are set up properly and work just fine but I cannot for the life of me get Google Suite email to work with my PHP mail form on my website; it doesn’t send the email successfully to Google’s mail servers, I get the following error in the email logs: “The mail server could not deliver mail to firstname.lastname@example.org. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.” I can send email just fine normally to and from the G Suite email, just not from the PHP form submission.
The domain is new and not blacklisted and the DNS entries seem correct.
Here is a list of everything I have tried:
What the problem might be (what I haven’t gotten help for)
At this point I may just give someone my credentials to login and see what I am missing.
Here are some guides I have already followed:
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