Not recieveing mail from my form

public void SendEmail(string from, string to, string subject, string body)
{
    string host = "smtp.gmail.com";
    int port = 587;

    MailMessage msg = new MailMessage(from, to, subject, body);
    SmtpClient smtp = new SmtpClient(host, port);

    string username = "example@gmail.com";
    string password = "password";

    smtp.Credentials = new NetworkCredential(username, password);
    smtp.EnableSsl = true;
    smtp.UseDefaultCredentials = false;

    try
    {    
        smtp.Send(msg);
    }
    catch (Exception ex)
    {
        // do something with it...
    }
}