I'm looking for a mail solution that will do one very important thing: Block our office staff from sending emails to particular email addresses. Why? Because our people surf the web and send emails to people who look like they might be good customers for us. However, as you may know, many people/companies on the web are listed on several different websites. If one of our staff sends and email to a person that I'll call Bob, and Bob then replies "do not email me anymore", then yes, this particular staff person knows not to email Bob anymore. But a second staff person, on a different computer, in a different room, at a different time, has no idea that Bob told us not to email. And so this second staff person finds Bob on a different website, and emails Bob at the same email address that Bob said for us not to send any emails to. Since we send emails like this to over 1000 people per day, it is impossible for us to us paper to keep track of who we should not send emails to. So, I'm looking for a product that will look at all the outgoing-emails that our staff sends, and will check who they are being sent to, and make sure none of the emails are on our list of do-not-emails (which Bob's email address would have been on.) With such a product, Bob would be on this do-not-email list, and if any staff member on any computer at any time tried to email Bob, the email would be blocked by the product. Any product that will do this is OK... either a mail server, or a plug-in to Outlook Express, or even a web-based-service that somehow checks our mail before it is sent out. Is there any product you can recommend? Bryan