We have 2 different domains to which our Exchange Server delivers emails. Company 1's end users are more conscientious about opening emails than Company 2's employees. Assume that the email addresses of end users for these 2 domains are as follows:
firstname.lastname@example.org and email@example.com.
Company 1's end users primarily Send/Receive emails ONLY to end users who are in the same domain as themselves. Company 2's end users Send/Receive emails from all points of the globe.
I'd like to setup a warning ONLY for Company 2's end users. This "header" would be at the top of the message body of every email that Company 2's end users receive from ANYONE OUTSIDE OUR OWN DOMAIN. The text of the warning would be something like: "Please be aware that this email was received from someone outside Company2. Always use CAUTION when opening an attachment or clicking on a link from these outside sources."
I'd like this warning to be at the top of the message body instead of a "footer/disclaimer" type of message at the bottom of the email. If it's there, most end users will never see it.
If Jane Doe receives an email from firstname.lastname@example.org, the body of the message would NOT receive any warning. If Jane Doe receives an email from ANYONE OUTSIDE THE "company2.com" domain, she would receive the warning - even if she receives an email from email@example.com.
All end users in our domain are using Outlook 2007.
I'm assuming this must be setup on the Exchange Server.