From: checklocaldomains@[HOSTNAME]
To: [ADMIN]
Bcc: [OWNER]
Subject: Domain [DOMAIN] is local but points to external IP

Warning!

Domain [DOMAIN] appears in the list of local domains of server
[HOSTNAME] but it is pointing to the external IP [IP].

This is a wrong situation which should be fixed as soon as possible,
as it can lead to serious problems. Please terminate the web hosting
account corresponding to domain [DOMAIN] or modify its name
servers so they start pointing toward the server. The name servers
should be the following:

[NAMESERVERS]

This is a security warning and must not be ignored.

Regards,
-- 
System Administration
[ADMIN]