Send a Raw SMTP Command

See more SMTP Examples

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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    success := false

    //  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 := chilkat.NewMailMan()

    //  Configure the SMTP server connection.
    mailman.SetSmtpHost("smtp.example.com")
    mailman.SetSmtpPort(465)
    mailman.SetSmtpSsl(true)
    mailman.SetSmtpUsername("user@example.com")
    mailman.SetSmtpPassword("myPassword")

    success = mailman.OpenSmtpConnection()
    if success == false {
        fmt.Println(mailman.LastErrorText())
        mailman.DisposeMailMan()
        return
    }

    //  Send the raw SMTP NOOP command (not base64-encoded).
    response := mailman.SmtpSendRawCommand("NOOP","us-ascii",false)
    if mailman.LastMethodSuccess() == false {
        fmt.Println(mailman.LastErrorText())
        mailman.DisposeMailMan()
        return
    }

    fmt.Println("NOOP response: ", *response)

    success = mailman.CloseSmtpConnection()
    if success == false {
        fmt.Println(mailman.LastErrorText())
        mailman.DisposeMailMan()
        return
    }


    mailman.DisposeMailMan()