C++

Send an SMTP RSET Command

Demonstrates the Chilkat MailMan.SmtpReset method, which sends an SMTP RSET command to the server. RSET resets the server-side state of the current mail transaction. This example opens a connection, sends RSET, and closes.

Background: During an SMTP session a message is built up across MAIL FROM and RCPT TO commands. If you need to abandon that partially-specified transaction — say an error occurred midway — RSET clears it without dropping the connection, so the same authenticated session can start a fresh message. It's a lightweight way to recover in-session rather than reconnecting.

Chilkat C++ Downloads

Download Chilkat for C++

C++

#include <CkMailMan.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  Demonstrates the MailMan.SmtpReset method, which sends an SMTP RSET command to the server.
    //  RSET resets the server-side state of the current mail transaction.

    CkMailMan mailman;

    //  Configure the SMTP server connection.
    mailman.put_SmtpHost("smtp.example.com");
    mailman.put_SmtpPort(465);
    mailman.put_SmtpSsl(true);
    mailman.put_SmtpUsername("user@example.com");
    mailman.put_SmtpPassword("myPassword");

    //  Open the connection.

    success = mailman.OpenSmtpConnection();
    if (success == false) {
        std::cout << mailman.lastErrorText() << "\r\n";
        return;
    }

    //  Reset the current SMTP mail transaction.
    success = mailman.SmtpReset();
    if (success == false) {
        std::cout << mailman.lastErrorText() << "\r\n";
        return;
    }

    success = mailman.CloseSmtpConnection();
    if (success == false) {
        std::cout << mailman.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Sent SMTP RSET." << "\r\n";
    }