(Delphi ActiveX) Read IMAP Email Headers

Call FetchHeaders to download only the email headers.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
imap: TChilkatImap;
success: Integer;
messageSet: IMessageSet;
fetchUids: Integer;
bundle: IChilkatEmailBundle;
i: Integer;
email: IChilkatEmail;
j: Integer;
name: WideString;
addr: WideString;
numAttach: Integer;
attachSize: Integer;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

imap := TChilkatImap.Create(Self);

// Connect to an IMAP server.
// Use TLS
imap.Ssl := 1;
imap.Port := 993;
success := imap.Connect('imap.someMailServer.com');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// Login
success := imap.Login('****','****');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// Select an IMAP mailbox
success := imap.SelectMailbox('Inbox');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// We can choose to fetch UIDs or sequence numbers.
fetchUids := 1;
// Get the message IDs of all the emails in the mailbox
messageSet := imap.Search('ALL',fetchUids);
if (imap.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// When downloading headers, each email object contains
// (obviously) the headers, but the body will be missing.
// Also, attachments will not be included.  However, it is
// possible to get information about the attachments
// as well as the complete size of the email.

bundle := imap.FetchHeaders(messageSet);
if (imap.LastMethodSuccess <> 1) then
  begin

    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// Loop over the email objects and display information
// about each:

for i := 0 to bundle.MessageCount - 1 do
  begin

    email := bundle.GetEmail(i);

    // Display the From and Subject
    Memo1.Lines.Add(email.From);
    Memo1.Lines.Add(email.Subject);

    // Display the recipients:

    for j := 0 to email.NumTo - 1 do
      begin
        name := email.GetToName(j);
        addr := email.GetToAddr(j);
        Memo1.Lines.Add(name + ', ' + addr);
      end;

    for j := 0 to email.NumCC - 1 do
      begin
        name := email.GetCcName(j);
        addr := email.GetCcAddr(j);
        Memo1.Lines.Add(name + ', ' + addr);
      end;

    // Show the total size of the email, including body and attachments:
    Memo1.Lines.Add(IntToStr(email.Size));

    // When a full email is downloaded, we would use the
    // email.NumAttachments property in conjunction with the
    // email.GetMailAttach* methods.
    // However, when an email object contains only the header,
    // we need to access the attachment info differently:
    numAttach := imap.GetMailNumAttach(email);
    for j := 0 to numAttach - 1 do
      begin
        Memo1.Lines.Add(imap.GetMailAttachFilename(email,j));
        attachSize := imap.GetMailAttachSize(email,j);
        Memo1.Lines.Add('    size = ' + IntToStr(attachSize) + ' bytes');
      end;

    Memo1.Lines.Add('--');

  end;

// Disconnect from the IMAP server.
success := imap.Disconnect();
end;