MainPage.xaml.cs

using System.Net.Mail;  
using Xamarin.Forms;  
  
namespace XamarinFormsEmail  
{  
    public partial class MainPage : ContentPage  
    {  
        public MainPage()  
        {  
            InitializeComponent();  
        }  
  
        void btnSend_Clicked(object sender, System.EventArgs e)  
        {  
            try{  
  
                MailMessage mail = new MailMessage();  
                SmtpClient SmtpServer = new SmtpClient("email-smtp.us-east-1.amazonaws.com");  
  
                mail.From = new MailAddress("susairajs18@gmail.com");  
                mail.To.Add(txtTo.Text.ToLower());  
                mail.Subject = txtSubject.Text;  
                mail.Body = txtBody.Text;  
  
                SmtpServer.Port = 587;  
                SmtpServer.Host = "email-smtp.us-east-1.amazonaws.com";  
                SmtpServer.EnableSsl = true;  
                SmtpServer.UseDefaultCredentials = false;  
                SmtpServer.Credentials = new System.Net.NetworkCredential("AKI*****2LUH6IA", "AnH9IL********eRL5xjGa2LsmDDbozvsTx");  
  
                SmtpServer.Send(mail);  
            }  
            catch(Exception ex)  
            {  
                DisplayAlert("Faild", ex.Message, "OK");  
            }  
        }  
    }  
}