Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
Handles Button1.Click
Dim smtp As New SmtpClient("mail.server")
''基本認証
smtp.Credentials = New System.Net.NetworkCredential("userid", "password")
''メール送信
smtp.Send("from@vbstation.net", "to.vbstation.net", "subject", "body")
MessageBox.Show("送信完了")
End Sub
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