I’m struggling with this problem and don’t know the solution
I use a Sendinblue account to manage my website transactional emails
mydomain[.]com is hosted on OVH and DNS are pointing to cloudflare.
I want to configure a dedicated IP address rather than the mutualised one to manage my sendinblue mailing and there is a great tuto to explain that (sendinblue Step-1-Delegating-your-subdomain)
I followed all the instructions to link my subdomain email[.]mydomain[.]com and my sendinblue dedicated IP but nothing to do, impossible to link and apparently the problems comes from DNS server.
Sendinblue can’t help with the OVH + CLOUSFLARE config, they don’t understand
This is why I need cloudflare community help
Here is my DNS config : https://prnt.sc/sou1bb