public void Send(KeyValuePair<string, string> from, KeyValuePair<string, string> to, string subject, string body)
 {
     var msg = new MailMessageBuilder().BuildMailMessage(from, to, subject, body);
     Send(msg);
 }
 public void Send(string from, string to, string subject, string body)
 {
     var msg = new MailMessageBuilder().BuildMailMessage(from, to, subject, body);
     Send(msg);
 }