You might have this at some point especially if you had recently made any DNS changes to your hostname domain or the resolver configuration.
2022-08-30 02:45:48 1beNoq-0002Ca-Th <= firstname.lastname@example.org U=root P=local S=666 T=“lfd on mysever.myhostname.com: WHM/cPanel root access alert from xx.xx.xxx.xxx” for root
2022-08-30 02:45:48 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1beNoq-0002Ca-Th
2022-08-30 02:45:49 1beNoq-0002Ca-Th ** email@example.com R=fail_remote_domains: The mail server could not deliver mail to firstname.lastname@example.org. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.
To solve this issue you can try the following:
- The email account root emails are forwarded is valid
- Your server’s hostname is included in /etc/localdomains file
- For your server resolver configuration, in this case, try using the 18.104.22.168 and 22.214.171.124
Should you keep facing the issue, just let us know by creating a new support request and our Sys Admins will take over and sort this out for you!