Unable to send support ticket

This is the error I got when trying to send support ticket direct from webmin/virtualmin

Collecting domain validation report and config check …
… done.

Collecting detailed system information …
… done.

Sending support ticket to virtualmin.com
… failed with HTTP error : HTTP/1.1 403 Forbidden

The ticket was about “unable to receive email from outside to an email address”

SYSTEM INFORMATION
OS type and version: Centos 8
Webmin version: REQUIRED
Virtualmin version: REQUIRED
Related products version: RECOMMENDED