title: Asp.net Mail Sending Client works on some, but not all computers?
body: <p>I made a mail client in Visual Basic (2008 if that matters) and it works perfectly on one laptop I tried it on, but on another it gives me the message: "Failure Sending Mail"
  What would cause that problem?  I don't think it's firewall cause I tried turning the firewall off on the computer it wasn't working on but that didn't solve anything.  </p>
  
  <pre><code>      Private Sub PictureBox2_Click(ByVal sender As System.Object, ByVal e As  System.EventArgs) Handles PictureBox2.Click
  Try
      Dim smtpServer As New SmtpClient("smtp.aol.com")
      Dim Mail As New MailMessage()
      smtpServer.UseDefaultCredentials = False
      smtpServer.Credentials = New Net.NetworkCredential("Email", "Pass"
      smtpServer.Port = 587
      smtpServer.Host = "smtp.aol.com"
      smtpServer.DeliveryMethod = SmtpDeliveryMethod.Network
      smtpServer.EnableSsl = True
      Mail.From = New MailAddress("Email")
      Mail.To.Add("Email")
      smtpServer.Send(Mail)
  Catch Ex As Exception
      MsgBox(Ex.Message)
  End Try
  </code></pre>