email verification

Hi nithesh
you can use Regular expression for validation email id or using code behind , visit my link below i have written an article upon regular expression for validate user input or try below code.

bool IsValidEmail(string email) { try { var mail = new System.Net.Mail.MailAddress(email); return true; } catch { return false; } }
hope above code will help your

Hi ,
     may i know the project is web application or windows application......
and if it is web application means refer this link

 http://stackoverflow.com/questions/8080333/sending-email-with-verification-link-while-user-subscribed-to-a-site