Delphi DLL

Fetch Inbox Email Headers

Downloads the headers of all emails in the Inbox and shows some information about each, such as From, Subject, and whether the email has been seen (already read) or not. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
imap: HCkImap;
count: Integer;
bundle: HCkEmailBundle;
emailHeader: HCkEmail;
i: Integer;
seenFlag: Integer;

begin
success := False;

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

imap := CkImap_Create();

// Connect to an IMAP server.
// Use TLS
CkImap_putSsl(imap,True);
CkImap_putPort(imap,993);
success := CkImap_Connect(imap,'imap.example.com');
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

// Login
success := CkImap_Login(imap,'myLogin','myPassword');
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

// Select an IMAP mailbox
success := CkImap_SelectMailbox(imap,'Inbox');
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

// Normally, when an email is downloaded, its "Seen" flag is automatically set.
// We don't want our program to be interfering with the "Seen" flags.
// To do this, set the PeekMode to True.
CkImap_putPeekMode(imap,True);

// After selecting the mailbox, the NumMessages property
// will contain the number of emails in the mailbox.
// When sequence numbers (not UIDs) are used to reference emails,
// they range from 1 to N, where N is the number of messages in the mailbox.
// This example will download the headers by sequence numbers.
count := CkImap_getNumMessages(imap);

bundle := CkEmailBundle_Create();
success := CkImap_FetchRange(imap,True,1,count,bundle);
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

if (CkEmailBundle_getMessageCount(bundle) = 0) then
  begin
    Memo1.Lines.Add('No messages in Inbox.');
    Exit;
  end;

// Loop over the email headers.  
emailHeader := CkEmail_Create();
i := 0;
while i < CkEmailBundle_getMessageCount(bundle) do
  begin

    CkEmailBundle_EmailAt(bundle,i,emailHeader);

    Memo1.Lines.Add(CkEmail__from(emailHeader));
    Memo1.Lines.Add(CkEmail__subject(emailHeader));

    // Get the "Seen" flag.
    // When an email is fetched from the IMAP server, the email flags are stored
    // within the email in the "ckx-imap-flags" header.
    // The call to GetMailFlag is simply getting the information from the email header.
    // (it is not communicating with the IMAP server to get this information, because
    // the information was obtained when downloading the headers)
    seenFlag := CkImap_GetMailFlag(imap,emailHeader,'Seen');
    if (seenFlag = 1) then
      begin
        Memo1.Lines.Add('This email has been read (already seen)');
      end
    else
      begin
        Memo1.Lines.Add('This email has not yet been read (it is not yet seen)');
      end;

    // We can also look directly at the "ckx-imap-flags" header:
    Memo1.Lines.Add('ckx-imap-flags: ' + CkEmail__getHeaderField(emailHeader,'ckx-imap-flags'));

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

    i := i + 1;
  end;

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

CkImap_Dispose(imap);
CkEmailBundle_Dispose(bundle);
CkEmail_Dispose(emailHeader);

end;