When I tried to send an email to email address [email protected] , the DNS propagation for the MX records hadn’t finalised by Google and since then I keep getting:
The domain has fully propagated but I cannot get Hestia/EXIM to update it. I have rebooted the server, restarted BIND and EXIM multiple times and no success.
Thank you @sahsanu for the reply. After continued investigation I found the issue. It wasn’t the Google DNS as you said.
The issue was the domain had been created in hestia and email had been configured but with no user accounts. Since this domain has outsourced the email to Microsoft, I deleted the email domain in the GUI and the problem was resolved.