Swift

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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Swift


func chilkatTest() {
    var success: Bool = 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.

    let mailman = CkoMailMan()!

    //  Configure the SMTP server connection.
    mailman.smtpHost = "smtp.example.com"
    mailman.smtpPort = 465
    mailman.smtpSsl = true
    mailman.smtpUsername = "user@example.com"
    mailman.smtpPassword = "myPassword"

    success = mailman.openSmtpConnection()
    if success == false {
        print("\(mailman.lastErrorText!)")
        return
    }

    //  Send the raw SMTP NOOP command (not base64-encoded).
    var response: String? = mailman.smtpSendRawCommand(command: "NOOP", charset: "us-ascii", bEncodeBase64: false)
    if mailman.lastMethodSuccess == false {
        print("\(mailman.lastErrorText!)")
        return
    }

    print("NOOP response: \(response!)")

    success = mailman.closeSmtpConnection()
    if success == false {
        print("\(mailman.lastErrorText!)")
        return
    }


}