Pascal (Lazarus/Delphi)

Fetch One POP3 Message by Message Number

Demonstrates the Chilkat MailMan.FetchOne method, which retrieves one message by POP3 message number and stores it in an Email object. The arguments are headerOnly, numBodyLines, the message number (the first message is 1), and the Email. The message remains on the server. This example fetches message 1 in full.

Background: POP3 message numbers are simple 1-based positions valid only for the current session. FetchOne is the way to pull a single message straight into an Email object (rather than a bundle) when you know its position — for example after listing the mailbox. Because numbers can shift between sessions, FetchByUidl is the stabler choice when a message must be identified reliably over time.

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Pascal (Lazarus/Delphi)

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.MailMan,
  Chilkat.Email;

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

procedure RunDemo;
var
  success: Boolean;
  mailman: TMailMan;
  email: TEmail;

begin
  success := False;

  //  Demonstrates the MailMan.FetchOne method, which retrieves one message by POP3 message
  //  number and stores it in an Email object.  The arguments are headerOnly, numBodyLines, the
  //  message number (the first message is 1), and the Email.  The message remains 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';

  //  Fetch message number 1 in full.  headerOnly=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.
  email := TEmail.Create;

  success := mailman.FetchOne(False,0,1,email);
  if (success = False) then
    begin
      WriteLn(mailman.LastErrorText);
      Exit;
    end;

  WriteLn('Subject: ' + email.Subject);
  WriteLn('From: ' + email.From);

  //  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;
  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.