A first chance exception of type 'System.Net.Mail.SmtpException' occurred in System.dll

Question

Can someone help me with this?

A first chance exception of type 'System.Net.Mail.SmtpException' occurred in System.dll

when i press i receive that message in 2 seconds.

here's my code!

        Dim MyMailMessage As New MailMessage()
        Try
            MyMailMessage.From = New MailAddress("[e-mail]")
            MyMailMessage.To.Add("[e-mail]")
            MyMailMessage.Subject = TextBox1.Text
            MyMailMessage.Body = TextBox2.Text
            Dim SMTP As New SmtpClient("smtp.gmail.com")
            SMTP.Port = 587
            SMTP.EnableSsl = True
            SMTP.Credentials = New System.Net.NetworkCredential("eusername", "jpassword")
            SMTP.Send(MyMailMessage)
            MsgBox("Message Has Been sent!!")
        Catch ex As Exception

        End Try

the msgbox doesnt show too!

I hope that someone will help me with this.

Answer 1

See Smtp Exception?

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Only performance counts!

Answer 2

Use breakpoints to find when exactly the exception is thrown. Most likely your username, passsword, or server info is incorrect.

Answer 3

This one have very very simple solution. Your client has no problem. It is gmail who is the culprit here. You just need to change your gmail settings.

Here is the change bellow:

1. Click the gear icon in the upper right, then select Settings.
2. In the General tab, set "Browser connection" to one of the following:
   • Always use https
   • Don't always use https
   Note: If you've never changed the setting, no radio button will be selected, but the default is "Always use https."
3. Click Save Changes.
4. To start accessing Gmail via HTTP, manually change the URL to http://mail.google.com.