I created an Exchange 2003 Distribution list then added contacts with external email as members so the internal email users can email to a group of outside email addresses.
After a few days the external email addresses in this distribution group are getting email addressed to internal email accounts. (Internal email was routed by mistake)
The external email users are forwarded to internal users asking is'nt this yours.
This was confidential internal company email not even addressed to them but someone inside the company. After I disabled the distribution group the problem stopped. An engineer said the same thing happened to him last year and he had to delete the all distribution groups for external email users. What is the right way to setup a distribution group in AD for sending email to a group of external email addresses and not have to worry about uncontrolled email, does anyone have a simulare experience ?