Delphi DLL Requires Chilkat v11.0.0+

POP3 to SMTP Forwarder

Read a POP3 mailbox and forwards the email to another email address, keeping the recipients in the original email the same. Delphi DLL

var
success: Boolean;
mailman: HCkMailMan;
fromAddr: PWideChar;
toAddr: PWideChar;
stUidls: HCkStringTable;
bdMime: HCkBinData;
count: Integer;
i: Integer;
uidl: PWideChar;

begin
success := False;

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

mailman := CkMailMan_Create();

//  Set the POP3 server's hostname
CkMailMan_putMailHost(mailman,'pop.example.com');

//  Set the POP3 login/password.
CkMailMan_putPopUsername(mailman,'MY_POP3_LOGIN');
CkMailMan_putPopPassword(mailman,'MY_POP3_PASSWORD');

//  Set the SMTP hostname for sending.
CkMailMan_putSmtpHost(mailman,'smtp.example.com');
CkMailMan_putSmtpUsername(mailman,'MY_SMTP_LOGIN');
CkMailMan_putSmtpPassword(mailman,'MY_SMTP_PASSWORD');

fromAddr := 'me@example.com';
toAddr := 'recipient@somewhere.com';

//  The the UIDLs for all email in the POP3 mailbox.
stUidls := CkStringTable_Create();
success := CkMailMan_FetchUidls(mailman,stUidls);
if (success = False) then
  begin
    Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
    Exit;
  end;

//  Just mark messages for delete, then delete at the end.
CkMailMan_putImmediateDelete(mailman,False);

//  Download the email from the server.  Call FetchMimeBd
//  because we don't want to load the emails into email objects.
//  (We'll delete the emails that are forwarded without error.)
bdMime := CkBinData_Create();

count := CkStringTable_getCount(stUidls);
i := 0;
while i < count do
  begin
    uidl := CkStringTable__stringAt(stUidls,i);
    Memo1.Lines.Add('UIDL: ' + uidl);

    success := CkMailMan_FetchMimeBd(mailman,uidl,bdMime);
    if (success = False) then
      begin
        Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
        Exit;
      end;

    success := CkMailMan_SendMimeBd(mailman,fromAddr,toAddr,bdMime);
    if (success = False) then
      begin
        Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
        Exit;
      end;

    success := CkMailMan_DeleteByUidl(mailman,uidl);
    if (success = False) then
      begin
        Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
        Exit;
      end;

    i := i + 1;
  end;

//  Delete messages marked for delete.
CkMailMan_putImmediateDelete(mailman,True);
success := CkMailMan_Pop3EndSession(mailman);
if (success = False) then
  begin
    Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
    Exit;
  end;

Memo1.Lines.Add('Success.');

CkMailMan_Dispose(mailman);
CkStringTable_Dispose(stUidls);
CkBinData_Dispose(bdMime);