Fetch a Set of POP3 Messages by UIDL

See more POP3 Examples

Demonstrates the Chilkat MailMan.FetchUidlSet method, which retrieves the messages whose UIDLs are listed in a StringTable and appends them to an EmailBundle. The arguments are the UIDL StringTable, headersOnly, numBodyLines, and the EmailBundle. This example fetches two specific messages by UIDL.

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.StringTable,
  Chilkat.EmailBundle,
  Chilkat.Email,
  Chilkat.MailMan;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  mailman: TMailMan;
  uidls: TStringTable;
  bundle: TEmailBundle;
  n: Integer;
  email: TEmail;
  i: Integer;

begin
  success := False;

  //  Demonstrates the MailMan.FetchUidlSet method, which retrieves the messages whose UIDLs are
  //  listed in a StringTable and appends them to an EmailBundle.  The arguments are the UIDL
  //  StringTable, headersOnly, numBodyLines, and the EmailBundle.  The messages remain on the
  //  server.

  mailman := TMailMan.Create;

  //  Configure the POP3 server connection.
  mailman.MailHost := 'pop.example.com';
  mailman.MailPort := 995;
  mailman.PopSsl := True;
  mailman.PopUsername := 'user@example.com';
  mailman.PopPassword := 'myPassword';

  //  Build the set of UIDLs to fetch.
  uidls := TStringTable.Create;
  uidls.Append('0000000123abcdef');
  uidls.Append('0000000124abcdef');

  //  Fetch the listed messages (full bodies) into a bundle.
  //  headersOnly=False (fetch the entire message).
  //  Note: numBodyLines only applies when headersOnly is True (it sets how many lines of the
  //  body to include along with the headers).  When headersOnly is False, the entire message
  //  is fetched and numBodyLines is ignored.
  bundle := TEmailBundle.Create;

  success := mailman.FetchUidlSet(uidls,False,0,bundle);
  if (success = False) then
    begin
      WriteLn(mailman.LastErrorText);
      Exit;
    end;

  n := bundle.MessageCount;
  WriteLn('Fetched ' + n + ' messages.');

  email := TEmail.Create;

  for i := 0 to n - 1 do
    begin
      success := bundle.EmailAt(i,email);
      WriteLn(email.Subject);
    end;

  //  Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
  //  connects and authenticates -- using the property settings above -- whenever a server
  //  operation requires it.  Calling the explicit connect/authenticate methods can still be
  //  helpful to determine whether a failure occurs while connecting or while authenticating.


  mailman.Free;
  uidls.Free;
  bundle.Free;
  email.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.