it's very easy send an email with asp.net... if you search on google for "send email asp.net" you'll get tons of resutls. Here you have one,
http://www.aspfree.com/aspnet/email.aspx
if you need something more advanced you can get AspNetEmail. You can find this amazing component @ www.aspnetemail.com
Also, you can get help on ASP.Net & Email issues @
http://groups.yahoo.com/group/AspNetEmail