Node.js

Open a Persistent SMTP Connection

Demonstrates the Chilkat MailMan.OpenSmtpConnection method, which explicitly opens a connection to the SMTP server and authenticates if a username and password, OAuth2 token, or other applicable settings have been provided. This example opens the connection, notes where sending would occur, and closes it.

Background: By default, sending a single email opens a connection, sends, and closes it. When sending many messages, that per-message overhead adds up. Explicitly calling OpenSmtpConnection once, sending in a loop, then CloseSmtpConnection keeps a single authenticated session open for the whole batch — substantially faster and gentler on the server than reconnecting each time.

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Node.js

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function chilkatExample() {

    var success = false;

    //  Demonstrates the MailMan.OpenSmtpConnection method, which explicitly opens a connection
    //  to the SMTP server and authenticates if credentials (or an OAuth2 token) have been
    //  provided.

    var mailman = new chilkat.MailMan();

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

    //  Explicitly open (and authenticate) the SMTP connection.

    success = mailman.OpenSmtpConnection();
    if (success == false) {
        console.log(mailman.LastErrorText);
        return true;
    }

    console.log("SMTP connection opened.");

    //  ... send one or more emails here ...

    //  Close the connection when done.
    success = mailman.CloseSmtpConnection();
    if (success == false) {
        console.log(mailman.LastErrorText);
        return true;
    }


}

chilkatExample();