To extend the answer to bdukes ...
SendEmail () is great for sending basic emails.
SendMail () is great for sending emails where you need to access additional options. . Functions such as CC addresses, BCC addresses, and body style can be set using this function. A function call looks a lot more complicated, but apart from a few additional parameters, there is nothing difficult to use SendMail (), so do not despair if you need to configure a call features take an extra minute.
When using SendMail (), if blank lines are used for SMTP parameters, the function will use the DNN SMTP settings.
Here is a short article by Chris Hammond that shows how easy it is to use SendMail (), http://weblogs.asp.net/christoc/archive/2006/06/23/DotNetNuke-Daily-Tip-6_2D00_23_2D00_06.aspx
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