Delphi DLL Requires Chilkat v11.0.0+

How to Download Messages in MessageSet One at a Time

See more IMAP Examples

If a message set contains a huge number of emails, it's NOT a good idea to try to download all at once into an email bundle using a method such as FetchBundle. It's better to iterate over the messages in the set to download one by one. Delphi DLL

var
success: Boolean;
imap: HCkImap;
fetchUids: Boolean;
messageSet: HCkMessageSet;
email: HCkEmail;
i: 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 using 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;

//  Authenticate
success := CkImap_Login(imap,'email_account_login','email_account_password');
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;

//  Search for messages and return a set of matching messages.
//  (This example will simply search for ALL messages.)
fetchUids := True;

messageSet := CkMessageSet_Create();
success := CkImap_QueryMbx(imap,'ALL',fetchUids,messageSet);
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

Memo1.Lines.Add('Number of messages = ' + IntToStr(CkMessageSet_getCount(messageSet)));

email := CkEmail_Create();
i := 0;
while i < CkMessageSet_getCount(messageSet) do
  begin
    success := CkImap_FetchEmail(imap,False,CkMessageSet_GetId(messageSet,i),fetchUids,email);
    if (success = False) then
      begin
        Memo1.Lines.Add(CkImap__lastErrorText(imap));
        Exit;
      end;

    Memo1.Lines.Add(CkEmail__from(email) + '; ' + CkEmail__subject(email));

    i := i + 1;
  end;

Memo1.Lines.Add('OK');

CkImap_Dispose(imap);
CkMessageSet_Dispose(messageSet);
CkEmail_Dispose(email);