Delphi ActiveX

Send a Raw SMTP Command

Demonstrates the Chilkat MailMan.SmtpSendRawCommand method, which sends a raw command to the SMTP server and returns the server's response. The second argument specifies the charset to use if the command contains non-US-ASCII characters, and the third indicates whether to base64-encode the command before sending. This example sends a raw NOOP on an open connection.

Background: SMTP is a line-based text protocol (EHLO, MAIL FROM, RCPT TO, DATA, QUIT), so a raw-command hook lets you issue anything Chilkat doesn't wrap — a server extension, or a custom step during a manual auth exchange. The base64 flag exists because some SMTP exchanges (notably AUTH challenge/response) require the argument to be base64-encoded on the wire.

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var
success: Integer;
mailman: TChilkatMailMan;
response: WideString;

begin
success := 0;

//  Demonstrates the MailMan.SmtpSendRawCommand method, which sends a raw command to the SMTP
//  server and returns the server's response.  The 2nd argument is the charset used if the
//  command contains non-US-ASCII characters, and the 3rd indicates whether to base64-encode
//  the command before sending.

mailman := TChilkatMailMan.Create(Self);

//  Configure the SMTP server connection.
mailman.SmtpHost := 'smtp.example.com';
mailman.SmtpPort := 465;
mailman.SmtpSsl := 1;
mailman.SmtpUsername := 'user@example.com';
mailman.SmtpPassword := 'myPassword';

success := mailman.OpenSmtpConnection();
if (success = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;

//  Send the raw SMTP NOOP command (not base64-encoded).
response := mailman.SmtpSendRawCommand('NOOP','us-ascii',0);
if (mailman.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('NOOP response: ' + response);

success := mailman.CloseSmtpConnection();
if (success = 0) then
  begin
    Memo1.Lines.Add(mailman.LastErrorText);
    Exit;
  end;