Slipstick.com is the best site I know of for learning the magic of programming with Outlook, which is what most folks using Access use as an e-mail client. There are, of course, MANY other options, but if that's what you happen to be using, check out slipstick.
Also, if you're going that path, check out Redemption (google for that and Outlook, and you'll find it). It gets you around the weak and annoying security that is part of the later versions of Outlook. It costs a couple hundred dollars, but that's the developer's license. Once you've got that you can ship the library as part of your code to as many uses as you want for no charge.
Jeremy
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Jeremy Wallace
METRIX Lead Developer
Fund for the City of New York
http:// metrix . fcny . org