Modifying Content-Transfer-Encoding header   

I have a server that is sending SMTP messages with base64 encoding, yet for 
some reason when they get to the receiving server (no hops) they are encoded 
in 8bit.  I wrote an event sink that runs on the Windows 2003 smtp server 
that sets the Content-Transfer-Encoding header to 7bit, but it is being 
completely ignored.  Am I missing some fundamental thing here?  The lines 
before and after my change work.


Thanks for looking
dave

My Code:

try
{
  //Modify the attachment encoding to be 7bit
  if 
(bool.Parse(this.message.Fields["urn:schemas:httpmail:hasattachment"].Value.ToString()))
  {
    //if 
(this.message.Fields["urn:schemas:mailheader:Content-Transfer-Encoding"].Value.ToString() != "7bit")
    //{
        TextLog.LogEvent("changing encoding to 7bit", this.dt);
        
this.message.Fields["urn:schemas:mailheader:Foo-Content-Transfer-Encoding"].Value = "7bit";
        TextLog.LogEvent("changed encoding to 7bit", this.dt);
    //}
  }
}
catch (Exception ex)
{
  TextLog.LogError(ex.Message, this.dt);
}

//Save our message object
try
{
  this.message.EnvelopeFields.Update();
  this.message.Fields.Update();
  this.message.DataSource.Save();
}
catch (Exception ex)
{
  TextLog.LogError(ex.Message, this.dt);
}

date: Fri, 24 Feb 2006 14:51:28 -0800   author:   David A. Coursey

RE: Modifying Content-Transfer-Encoding header   

I forgot to mention that this event sink is of the type OnArrival.  Could it 
be that in the OnArrival stage I am now allowed to change the encoding?

dave

date: Fri, 24 Feb 2006 14:57:27 -0800   author:   David A. Coursey