Send email

Option Strict On

Imports System.Net.Mail ' Add ref Assemblies, Framework, System.Net

' Link for getting email settings. Search for other mail server settings if necessary at link.
' http://email.about.com/od/accessinggmail/f/Gmail_SMTP_Settings.htm

Public Class Form1

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Me.Location = New Point(CInt((Screen.PrimaryScreen.WorkingArea.Width / 2) - (Me.Width / 2)), CInt((Screen.PrimaryScreen.WorkingArea.Height / 2) - (Me.Height / 2)))
        TextBox2.Text = "587"
        TextBox3.Text = "smtp.gmail.com"
        MaskedTextBox1.PasswordChar = CChar("*")
        RadioButton1.Checked = True
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Button1.Enabled = False
        Button1.BackColor = Color.OrangeRed
        Button1.Text = "Mail is" & vbCrLf & "being" & vbCrLf & "SENT!"
        Dim mail As New MailMessage()
        Dim SmtpServer As New SmtpClient()
        SmtpServer.Credentials = New Net.NetworkCredential(TextBox1.Text, MaskedTextBox1.Text)
        SmtpServer.Port = CInt(TextBox2.Text) ' Some threads say to use port 587 and others 465. I don't have gmail so I can't try this code.
        SmtpServer.Host = TextBox3.Text
        SmtpServer.EnableSsl = True

        mail = New MailMessage()
        Try
            ' In the below line if you don't use a display name in the second field then the 2nd and 3rd fields are not necessary.
            ' The first field is the originating address.
            mail.From = New MailAddress(TextBox1.Text) ' ", "Some display name goes here", System.Text.Encoding.UTF8)

            ' A list that you can add various mail addresses to for sending to.
            For i = 0 To TextBox6.Lines.Count - 1
                mail.To.Add(TextBox6.Lines(i))
            Next

            mail.Subject = TextBox4.Text

            mail.Body = TextBox5.Text

            ' A list you can add various attachments to for the email. Of course if the attachment sizes max out what a sender or receiver
            ' is allowed or if a receiver will not accept a certain attachment type like a .exe (a .exe in a zip file works sending the zip
            ' file usually) then issues will occur.
            If MessageBox.Show("Would you like to add attachments?", "Add email attachments", MessageBoxButtons.OKCancel, MessageBoxIcon.Information) = Windows.Forms.DialogResult.OK Then
                Dim OFD As New OpenFileDialog
                OFD.Multiselect = True
                OFD.InitialDirectory = "C:\Users\John\Desktop"
                OFD.Title = "Add mail attachments."
                Do Until OFD.ShowDialog = Windows.Forms.DialogResult.Cancel
                    For Each Item In OFD.FileNames
                        mail.Attachments.Add(New Attachment(Item))
                    Next
                Loop
                OFD.Dispose()
            End If

            If MessageBox.Show("Would you like to add an image?", "Add an image", MessageBoxButtons.OKCancel, MessageBoxIcon.Information) = Windows.Forms.DialogResult.OK Then
                Using OFD As New OpenFileDialog
                    With OFD
                        .Multiselect = False
                        .Filter = "Image .Png files (*.Png)|*.Png"
                        .InitialDirectory = "C:\Users\John\Desktop"
                        .Title = "Add an image."
                    End With
                    If OFD.ShowDialog = Windows.Forms.DialogResult.OK Then
                        'to embed images, we need to use the prefix 'cid' in the img src value
                        'the cid value will map to the Content-Id of a Linked resource.
                        'thus <img src='cid:myimage'> will map to a LinkedResource with a ContentId of 'myimage'
                        'Dim htmlView As AlternateView = AlternateView.CreateAlternateViewFromString("<p>There is an embedded image below.</p>" & "<img src=cid:myimage>" & _
                        '                                                                          "<p>" & TextBox5.Text & "</p>", Nothing, "text/html")

                        Dim htmlView As AlternateView = AlternateView.CreateAlternateViewFromString("<html><head></head><body><header><p>There is an embedded image below.<p/></header><br><img src=cid:myimage alt=" & ChrW(34) & "Some image." & Chrw(34) & "><br><footer><p>" & TextBox5.Text & "<p/></footer></body></html>", Nothing, "text/html")
                        'create the LinkedResource (embedded image)
                        Dim logo As New LinkedResource(OFD.FileName, "image/png")
                        logo.ContentId = "myimage"
                        'add the LinkedResource to the appropriate view
                        htmlView.LinkedResources.Add(logo)
                        mail.AlternateViews.Add(htmlView)
                    End If
                End Using
            End If

            If RadioButton1.Checked Then
                mail.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure
            ElseIf RadioButton2.Checked Then
                mail.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess
            ElseIf RadioButton3.Checked Then
                mail.DeliveryNotificationOptions = DeliveryNotificationOptions.Delay
            ElseIf RadioButton4.Checked Then
                mail.DeliveryNotificationOptions = DeliveryNotificationOptions.None
            ElseIf RadioButton5.Checked Then
                mail.DeliveryNotificationOptions = DeliveryNotificationOptions.Never
            End If

            ' I suppose this list is in case a delivery notification fails but not sure.
            If TextBox7.Text <> "" Then
                For i = 0 To TextBox7.Lines.Count - 1
                    mail.ReplyToList.Add(TextBox7.Lines(i))
                Next
            End If
            SmtpServer.Send(mail)
            Button1.Enabled = True
            Button1.BackColor = Color.Lime
            Button1.Text = "Select me" & vbCrLf & "when email" & vbCrLf & "is ready to" & vbCrLf & "send."
        Catch ex As Exception
            MessageBox.Show(ex.ToString)
            Button1.Enabled = True
            Button1.BackColor = Color.Lime
            Button1.Text = "Select me" & vbCrLf & "when email" & vbCrLf & "is ready to" & vbCrLf & "send."
        End Try

    End Sub

    Private Sub RadioButtons_CheckedChanged(sender As Object, e As EventArgs) Handles RadioButton1.CheckedChanged, RadioButton2.CheckedChanged, RadioButton3.CheckedChanged, RadioButton4.CheckedChanged, RadioButton5.CheckedChanged
        For Each Ctl As RadioButton In Me.Controls.OfType(Of RadioButton)()
            Ctl.BackColor = SystemColors.ActiveCaption
        Next
        If DirectCast(sender, RadioButton).Checked Then
            DirectCast(sender, RadioButton).BackColor = Color.Lime
        End If
    End Sub

End Class