How to prevent users from sending to a specific email address

[DanieliaAdmin]

We currently have a security breach at work and wondered if there was a way to block our users from sending email to a specific email address or a wildcard of addresses. We want to prevent our employees from sending proprietary information outside of the company to certain people or groups they are not supposed to communicate with. Our environment is Microsoft Exchange 2003 and we currently have the enterprise version 10.2 of Symantec Antivirus & Spam filtering. Any help would be appreciated.

Thanks,
Danielian IT

 

[bustamove]

Looks like you don't want to play with exchange that much, symantec filter can do it, just apply a rule to check outgoing emails against a blacklist, and you put those emails/domains on that blacklist.

but, it doesn't stop people from sending information through other means, like hotmail or gmail.

 

[ntinlin]

Using Exchange you would do it under Global Settings, Message Delivery, Recipient Filtering.

But as bustamove says if your users have access to web mail then ain't nothing you can do.

Neill

 

[DanieliaAdmin]

Thanks guys. I've utilized both recommendations.