Delphi ActiveX

Delete a POP3 Message via an Email Object

Demonstrates the Chilkat MailMan.DeleteEmail method, which deletes a POP3 message using the UIDL stored in the X-UIDL header of an Email object. The email must contain an X-UIDL header, which it does after being fetched from the server. This example fetches a message and then deletes it.

Background: When Chilkat downloads a POP3 message it records the server UIDL in an X-UIDL header on the Email object. DeleteEmail uses that header to tell the server which message to remove — a natural "process then delete" flow: fetch a message, act on it, then delete it. As always in POP3, the deletion is only committed when the session ends (unless ImmediateDelete is set).

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var
success: Integer;
mailman: TChilkatMailMan;
email: TChilkatEmail;

begin
success := 0;

//  Demonstrates the MailMan.DeleteEmail method, which deletes a POP3 message using the UIDL
//  stored in the X-UIDL header of an Email object.  The email must contain an X-UIDL header
//  (as it does after being fetched from the server).

mailman := TChilkatMailMan.Create(Self);

//  Configure the POP3 server connection.
mailman.MailHost := 'pop.example.com';
mailman.MailPort := 995;
mailman.PopSsl := 1;
mailman.PopUsername := 'user@example.com';
mailman.PopPassword := 'myPassword';

//  Fetch a message (headers are enough; the X-UIDL header identifies it on the server).
email := TChilkatEmail.Create(Self);

success := mailman.FetchOne(1,0,1,email.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

//  Delete that message using its X-UIDL header.
success := mailman.DeleteEmail(email.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

//  Unless the ImmediateDelete property is set to 1, the message is only marked for
//  deletion.  End the POP3 session (which sends the QUIT command) to commit the deletion.
success := mailman.Pop3EndSession();
if (success = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Deleted the email from the POP3 server.');

//  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.