Delphi ActiveX

Get a Digest Message as an Email Object

Demonstrates the Chilkat Email.GetDigestEmail method, which copies the Nth digest email contained within a multipart/digest into another Email object. The first digest is at index 0; the NumDigests property gives the count. This example loads a digest email and lists each bundled message's subject.

Background: A multipart/digest packs many separate emails into one carrier message — historically used by mailing lists to send a single daily bundle of that day's posts. GetDigestEmail unpacks each member into a full Email object so it can be read or processed individually. This differs from GetAttachedEmail, which extracts messages attached to an ordinary email rather than the members of a digest.

Chilkat Delphi ActiveX Downloads

Download Chilkat for Delphi ActiveX

Delphi ActiveX

var
success: Integer;
email: TChilkatEmail;
n: Integer;
digestEmail: TChilkatEmail;
i: Integer;

begin
success := 0;

//  Demonstrates the GetDigestEmail method, which copies the Nth digest email contained
//  within a multipart/digest into another Email object.  The first digest is at index 0;
//  use the NumDigests property for the count.

email := TChilkatEmail.Create(Self);

success := email.LoadEml('qa_data/eml/digest.eml');
if (success = 0) then
  begin
    Memo1.Lines.Add(email.LastErrorText);
    Exit;
  end;

n := email.NumDigests;
Memo1.Lines.Add('NumDigests = ' + IntToStr(n));

//  Retrieve each bundled message as its own Email object.
digestEmail := TChilkatEmail.Create(Self);

for i := 0 to n - 1 do
  begin
    success := email.GetDigestEmail(i,digestEmail.ControlInterface);
    Memo1.Lines.Add('Digest ' + IntToStr(i) + ' subject: ' + digestEmail.Subject);
  end;

//  Note: The path "qa_data/..." is a relative local filesystem path,
//  relative to the current working directory of the running application.