Is it possible to filter outbound email messages based on the message contents?

Is it possible for an Exchange server administrator to create a filter the will not permit messages to be sent based on contents of the subject or body fields.  This is for outbound messages so the filter must be added to the smtp server.

The filter must be server based.  The solution can not be based on installing something within outlook.

If the capabilities don’t exist in-side of the Exchange server, a program that connects to the exchange server is also permissible solution.

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f_umarConnect With a Mentor Commented:
use gfi mail security

you can define rules on both inbound and outbound messages, u can block specific keywords and many things even on per user basis.
David WilhoitSenior Consultant, ExchangeCommented:
3rd party is your best bet for software on this one:

GFI mail essentials comes to mind. Search for spam filter software, and you'll get a ton or responses. Brightmail and Clearswift also make gateway/SMTP filtering solutions along with Symantec. Take your careful though, some of this stuff only works with a front end SMTP solution.

GFI mail essentials or iHateSpam are best
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mbalsamAuthor Commented:
I guess I was not clear in stating my question:

I DO NOT want to filter messages coming INTO the company. I want to filter messages going OUT OF the company.

So, if an employee uses bad language when sending an email, I want to be able to filter it out.

David WilhoitSenior Consultant, ExchangeCommented:
well that's certainly interesting, but the same rules apply: 3rd party software

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