Hmm spoke too soon, I setup and paid for the Cloudflare Server Shield for Plesk (there is very little to set up in fairness, just switch it on and off) and now no emails are coming through…It implied that you either have one or the other (ie ServerShield or a normal Cloudflare site, so I removed the sites from CLoudflare and tried to let ServerShield do its thing…it didnt, just error messages…
A record in Cloudflare DNS goes to IP address of server
MX record to mail server
and a txt entry for v=spf1 mx a ~all
Webmail works fine and the sites are up and running just no email client is receiving anything (Apple mail just says server unreachable)
I have now removed the extension from Plesk in a hope that things will get back to normal, but no luck so far, still no client emails and its back to work tomorrow>.