Not sure why but the new Big Boy…site I have set up seems to have a mail failure on sending to one certain email address that I know is receiving mail fine otherwise. The BCC copy also fails.
The Shopalottle site sends mail fine and the BCC is also all good. I can’t see what the difference is with them and why Big Boy is having this issue.
Why do you think this is Cloudflare related? Cloudflare generally does not handle email, so if something isnt working you’d need to contact your mail host.
Your SPF record looks ok. Not sure if the 3rd party service that sends that mail has a recommendation For adding them to your SPF but you might ask. An explicit add might help but ~all in your existing record sort of covers it anyway.
Might ask the mail provider to confirm it was delivered and end user to check their spam folder as well.