I am using Oracle cloud Ampere instance for hosting and mail domain as well. However I am aware that Oracle is blocking SMTP port 25 by default.
Hence, I am using sendinblue for sending mails (outbound) from my server to any 3rd party mail server (including Gmail) which is working fine.
Also I would like to add here that I am using cloudflare for my DNS record maintenance and SSL certificate purpose and I have purely kept my mail.mydomain.com here as DNS only. Still I would like to share my records here and try to get your review.
Haven’t tried it with sendinblue but other smtp provider but they all block as the sender is “domain.com” and not the original orginaldomain.com.
Other mail server software probally solved the issue… But I am not working full time with Exim so it complicated.
Please tell me that I don’t know it…
Also don’t post screenshots but just post the text in code blocks makes it easier to read.
Unless you were experiencing problems with webmail when it is proxied, there is no reason to set it to DNS Only. The PTR records you entered are doing nothing but occupying space in your zone file. PTR records are only useful in reverse zones, and you can only create those with an Enterprise subscription to Cloudflare.
If your goal is to use a Gmail account to receive domain mail, rather than forwarding, it works best to pull from the Gmail side.