(Delphi ActiveX) Move Selected Emails to another Mailbox Folder

Downloads emails one by one in a selected mailbox, decides which emails are to be moved, and then moves the set of messages to another mailbox folder.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
imap: TChilkatImap;
success: Integer;
numEmails: Integer;
mset: TMessageSet;
i: Integer;
email: IChilkatEmail;
destFolder: WideString;

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

imap := TChilkatImap.Create(Self);

// Connect to an IMAP server.
// Use TLS
imap.Ssl := 1;
imap.Port := 993;
success := imap.Connect('imap.someMailServer.com');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// Login
success := imap.Login('myLogin','myPassword');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// Select an IMAP mailbox
success := imap.SelectMailbox('Inbox');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    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 1.
imap.PeekMode := 1;

// 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.
numEmails := imap.NumMessages;

mset := TMessageSet.Create(Self);

// Indicate that mset contains sequence numbers, not UIDs.
mset.HasUids := 0;

// Fetch each email and decide for each if it is to be moved
// to a particular other mailbox.  If so, we'll add the sequence number to
// the mset, and then move all emails in the mset to the other mailbox.
i := 0;
while i < numEmails do
  begin
    // Fetch the email by sequence number.
    email := imap.FetchSingle(i + 1,0);
    if (imap.LastMethodSuccess <> 1) then
      begin
        Memo1.Lines.Add(imap.LastErrorText);
        Exit;
      end;

    // If it is decided to move the email, add the sequence number to mset, like this:
    mset.InsertId(i + 1);

  end;

// If there are emails in mset to be moved, then do it..
if (mset.Count > 0) then
  begin
    destFolder := 'Inbox/SomeOtherFolder';
    // Assuming your IMAP server supports the feature that allows for messages to be moved to another folder...
    success := imap.MoveMessages(mset.ControlInterface,destFolder);
    if (success <> 1) then
      begin
        Memo1.Lines.Add(imap.LastErrorText);
        Exit;
      end;

  end;

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