(Delphi ActiveX) How to Copy IMAP Mail to another IMAP Server

Demonstrates how to copy the entire contents of an IMAP mailbox to another IMAP server.

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
imapSrc: TChilkatImap;
success: Integer;
imapDest: TChilkatImap;
startSeqNum: Integer;
msgCount: Integer;
sa: ICkStringArray;
i: Integer;

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

imapSrc := TChilkatImap.Create(Self);

// Connect to our source IMAP server.
success := imapSrc.Connect('imap.someMailServer.com');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imapSrc.LastErrorText);
    Exit;
  end;

// Login to the source IMAP server
success := imapSrc.Login('admin@chilkatsoft.com','myPassword');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imapSrc.LastErrorText);
    Exit;
  end;

imapDest := TChilkatImap.Create(Self);

// Connect to our destination IMAP server.
success := imapDest.Connect('mail.example-code.com');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imapDest.LastErrorText);
    Exit;
  end;

// Login to the destination IMAP server
success := imapDest.Login('myLogin','myPassword');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imapDest.LastErrorText);
    Exit;
  end;

// Select an IMAP mailbox on the source IMAP server
success := imapSrc.SelectMailbox('Inbox');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imapSrc.LastErrorText);
    Exit;
  end;

// After selecting a mailbox, the NumMessages property will
// be updated to reflect the total number of emails in the mailbox:
Memo1.Lines.Add(IntToStr(imapSrc.NumMessages));

// The emails in the mailbox will always have sequence numbers
// ranging from 1 to NumMessages.

// This example will copy the first 10 messages.
// We'll leave it up to you to write code to copy
// the entire sequence range in reasonable size chunks.
startSeqNum := 1;
msgCount := 10;

sa := imapSrc.FetchSequenceAsMime(startSeqNum,msgCount);
if (imapSrc.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(imapSrc.LastErrorText);
    Exit;
  end;

for i := 0 to sa.Count - 1 do
  begin
    success := imapDest.AppendMime('Inbox',sa.GetString(i));
    if (success <> 1) then
      begin
        Memo1.Lines.Add(imapDest.LastErrorText);
        Exit;
      end;
  end;

// Disconnect from the IMAP servers.
success := imapSrc.Disconnect();
success := imapDest.Disconnect();
end;