This ASP.net code validates any input string that was email address or not. First script checkes all charcters are alphanumeric values such as (a-z,A-Z), numbers (0-9), hyphens (-), underscore (_) and periods (.). Our first rule is to check any un-allowed characters exists. Second step to search an @ sign.

I want to show you how it is possible to email form content to yourself or another person using the asp.net postback feature and a little creativity

sending an email through asp.net