(Go) SMTP using HTTP Proxy

Demonstrates how to communicate with an SMTP server via an HTTP proxy.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // The mailman object is used for sending and receiving email.
    mailman := chilkat.NewMailMan()

    // To connect through an HTTP proxy, set the HttpProxyHostname
    // and HttpProxyPort properties to the hostname (or IP address)
    // and port of the HTTP proxy.  Typical port numbers used by
    // HTTP proxy servers are 3128 and 8080.
    mailman.SetHttpProxyHostname("www.my-http-proxy.com")
    mailman.SetHttpProxyPort(3128)

    // Important:  Your HTTP proxy server must allow non-HTTP
    // traffic to pass.  Otherwise this does not work.

    // Set the SMTP server.
    mailman.SetSmtpHost("smtp.chilkatsoft.com")

    // Set the SMTP login/password (if required)
    mailman.SetSmtpUsername("myUsername")
    mailman.SetSmtpPassword("myPassword")

    // Create a new email object
    email := chilkat.NewEmail()

    email.SetSubject("This is a test")
    email.SetBody("This is a test")
    email.SetFrom("Chilkat Support <support@chilkatsoft.com>")
    success := email.AddTo("Chilkat Admin","admin@chilkatsoft.com")

    // Call SendEmail to connect to the SMTP server via the HTTP proxy and send.
    // The connection (i.e. session) to the SMTP server remains
    // open so that subsequent SendEmail calls may use the
    // same connection.  
    success = mailman.SendEmail(email)
    if success != true {
        fmt.Println(mailman.LastErrorText())
        mailman.DisposeMailMan()
        email.DisposeEmail()
        return
    }

    // Some SMTP servers do not actually send the email until 
    // the connection is closed.  In these cases, it is necessary to
    // call CloseSmtpConnection for the mail to be  sent.  
    // Most SMTP servers send the email immediately, and it is 
    // not required to close the connection.  We'll close it here
    // for the example:
    success = mailman.CloseSmtpConnection()
    if success != true {
        fmt.Println("Connection to SMTP server not closed cleanly.")
    }

    fmt.Println("Mail Sent!")

    mailman.DisposeMailMan()
    email.DisposeEmail()