Well, the guys at Krystal (who are always quick off the mark) have explained it’s an issue with the “Spam Experts Routing” module on the cPanel, from what I understand we have an “A” record in that module to our domain, when we enable Cloudflare that means the domain.co.uk part for the mail is now trying to send/receive mail through the domain, rather than the IP, etc, so the solution was to update the record with the server hostname instead of our domain, kinda get it in regards to our doman being proxied etc,re-enabled Cloudflare last night and mail is coming through without any issues now, I was trying to reply last night once I noticed things working but because I’m a noob I’m restricted to ## replies per day.
All seems well so far, but thank you for all your help domjh, and possibly another thing for you techies to add to your ever growing list of solutions lol 
All the best
Marko
3 Likes