I just finished a client app with a web form to send email. Being that this used to be old hat i found that i had lost all my sample code for this. So here it is for reference.

The process of sending mail is the same for Windows apps and asp.net websites as the same .Net classes are used. The process can be slightly shortened by specifying default SMTP settings in the web.config or app.config file. Here, I’m showing the full version of the code and it does not rely on any configuration settings. The code also specifies unicode encoding for the subject and body.

using System.Net.Mail; 
using System.Net;
//Create the mail message 
MailMessage mail = new MailMessage(); 
mail.Subject = "Subject"; 
mail.Body = "Main body goes here";
//the displayed "from" email address 
mail.From = new System.Net.Mail.MailAddress(you@live.com);  
mail.IsBodyHtml = false; 
mail.BodyEncoding = System.Text.Encoding.Unicode; 
mail.SubjectEncoding = System.Text.Encoding.Unicode; 
//Add one or more addresses that will receive the mail 
mail.To.Add("me@live.com"); 
//create the credentials 
NetworkCredential cred = new NetworkCredential( 
"you@live.com", //from email address of the sending account 
"password"); //password of the sending account 
//create the smtp client...these settings are for gmail 
SmtpClient smtp = new SmtpClient("smtp.gmail.com"); 
smtp.UseDefaultCredentials = false; 
smtp.EnableSsl = true;
//credentials (username, pass of sending account) assigned here 
smtp.Credentials = cred;  
smtp.Port = 587; 
//let her rip 
smtp.Send(mail);