Email.ClearOtherHeaders() example

this.EM = new Email();
var ErrVal = this.EM.Create(this);
if (ErrVal >= 0) {
  ...
  ...
  this.EM.SendMessage();
  ...
  ...
  this.EM.ClearOtherHeaders();
  this.em.AddOtherHeader('X-Sender:MyMailer v1.0');
  ...
  this.EM.SendMessage();
  ...
}