Software

I'm not sure I understand what you mean by "vetted at source".

If you're asking whether an e-mail header will tell you whether a message has been intercepted and read by someone other than the intended recipient, the answer is generally no.

Any mail that goes over the Internet in clear text is like a postcard that can be read by anyone along the way. If you don't want to share your thoughts with the world at large, you should choose an encryption tool and use it consistently.

paul

The only way that I can see that it might be possible to determine is to allow message tracking. You will need to enable this both for the MTA and information store. Be aware that this does cause a performance hit. You may want to specify how long to keep these log files which is done through System Attendant. These logs are located in \exchsvr\tracking.log.

You can capture internet emails and look through them but I really am not understanding the entire questions?

If you mean "looked at by somebody else" the answer is you can't.
If you mean "changed by somebody else" you could try getting a digital certificate and signing them.
If you don't want unauthorised people to be able to see them, you can encrypt them. Most e-mail clients support signing and encryption.

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