Sending mail through Gmail Programatically - C# .Net VS2005 Gmail

I was implementing a simple Contact Us form for a friend's website that would allow users to shoot him an E-mail message from the site. You can send E-mail directly from a .Net application using an SMTP server, but most free web-based E-mail companies wont allow you to use their SMTP servers for stuff like this. I was delighted to find that you could get this working with Gmail. I'll show you a quick sample method that will allow you to do this.
Information You'll Need...

1. Your Gmail information (Username, Password)
   • Username is your E-mail address (yourAccount@gmail.com)
2. The Gmail SMTP server address (smtp.gmail.com)
3. The port Gmail uses (465 or 587)

Namespaces used...

1. System.Net;
2. System.Net.Mail;
3. System.ComponentModel;

Key Objects...

1. MailMessage
2. SmtpClient

Your Configuration File

  <appSettings>
<add key="pswd" value="YourGmailPassword"/>
<add key="account" value="yourUserName@gmail.com"/>
<add key="host" value="smtp.gmail.com" />
</appSettings>

Implementing a simple SendMail method

public void SendMail(string host, int port, string userName, string pswd, string fromAddress, string toAddress, string body, string subject, bool sslEnabled) {
MailMessage msg = new MailMessage(new MailAddress(fromAddress), new MailAddress(toAddress));    //  Create a MailMessage object with a from and to address
        msg.Subject = subject;  //  Add your subject
        msg.SubjectEncoding = System.Text.Encoding.UTF8;
msg.Body = body;    //  Add the body of your message
        msg.BodyEncoding = System.Text.Encoding.UTF8;
msg.IsBodyHtml = false; //  Does the body contain html

SmtpClient client = new SmtpClient(host, port); //  Create an instance of SmtpClient with your smtp host and port
        client.Credentials = new NetworkCredential(userName, pswd); //  Assign your username and password to connect to gmail
        client.EnableSsl = sslEnabled;  //  Enable SSL

try {
client.Send(msg);   //  Try to send your message
            ShowMailMessage("Your message was sent successfully.", false);  //  A method to update a ui element with a message
            Clear();
}
catch (SmtpException ex) {
ShowMailMessage(string.Format("There was an error sending you message. {0}", ex.Message), true);
}
}

Calling your SendMail method

public void imgSubmit_Click(object sender, EventArgs e) {
string pswd = ConfigurationManager.AppSettings["pswd"]; //  Your Password
        string account = ConfigurationManager.AppSettings["account"];   //  Your account name (username@gmail.com)
        string host = ConfigurationManager.AppSettings["host"]; //  Your smtp server name (smtp.gmail.com)
        int port = 587; //  The port used to connect to your host

if (string.IsNullOrEmpty(pswd) || string.IsNullOrEmpty(account) || string.IsNullOrEmpty(host))  //  Validate App Settings
            ShowMailMessage("Unable to send your message. Configuration Error.", true);
else {
SendMail(host,
port,
account,
pswd,
txtFrom.Text,
account,
txtBody.Text,
txtSubject.Text,
true);
}
}

That's pretty much all there is to it. Your user fills out the form and clicks submit, and you get an E-mail in your Gmail box, send through your Gmail Account