//
// Simple application to send mails to any mail clients from Gmail account
// Using VB.NET
Imports System.Net.Mail
Public Class mailform
    Dim mail As New MailMessage()

   Private Sub mailform_Load(ByVal sender As System.Object, ByVal e As _
                System.EventArgs) Handles MyBase.Load
        TextBox2.Text = "xyz@gmail.com"
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles Button1.Click
        Dim SmtpServer As New SmtpClient()
        SmtpServer.Credentials = New Net.NetworkCredential
                    ("xyz@gmail.com", "password")
        SmtpServer.Port = 587
        SmtpServer.Host = "smtp.gmail.com"
        SmtpServer.EnableSsl = True

        mail = New MailMessage()
        Dim addr() As String = TextBox1.Text.Split(",")
        Try
            mail.From = New MailAddress("xyz@gmail.com",
                "Web Developers", System.Text.Encoding.UTF8)

            Dim i As Byte
            For i = 0 To addr.Length - 1
                mail.To.Add(addr(i))
            Next
            mail.Subject = TextBox3.Text
            mail.Body = TextBox4.Text
            If ListBox1.Items.Count <> 0 Then
                For i = 0 To ListBox1.Items.Count - 1
                    mail.Attachments.Add(New Attachment
                        (ListBox1.Items.Item(i)))
                Next
            End If
            mail.DeliveryNotificationOptions =
                    DeliveryNotificationOptions.OnFailure
            mail.ReplyTo = New MailAddress(TextBox1.Text)
            SmtpServer.Send(mail)
        Catch ex As Exception
            MsgBox(ex.ToString())
        End Try
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, _
            ByVal e As System.EventArgs) Handles Button2.Click
        If OpenFileDialog1.ShowDialog() = Windows.Forms.DialogResult.OK Then
            ListBox1.Items.Add(OpenFileDialog1.FileName)
        End If
    End Sub
End Class