I've been working on a sample tonight for one of my hosting customers showing how to create a "Contact Us" page in ASP.NET using System.Web.Mail.  Searching for examples of proper syntax, I came across System.Web.Mail, OH MY!  This is an exhaustive FAQ on using the built-in Mail framework library, including answers to common questions and problems, as well as advanced tips for adding functionality (such as SMTP authentication) that you may have thought not possible.

What I found especially interesting is that the site was created by Dave Wanta of 123Aspx fame, who also happens to sell a *very* good e-mail component for .NET named aspNetEmail.  He does include a shameless plug for his product buried in the FAQ.  After all, System.Web.Mail doesn't do everything.  But, to Dave's credit, he also lists a couple of other third-party tools and the entire site seems to be the best resource on the Web for using System.Web.Mail.  Kudos to Dave!