(Go) Create Non-Multipart Email with XML Body that is an Attachment

See more SMTP Examples

Creates an email where the only body is a binary WAV file. The technique used in the example could be applied to other binary files, such as PDF, MS-WORD docs, Excel docs, etc.

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

    // The goal of this example is to create an email that has this MIME format,
    // where the body of the email is XML using base64 encoding, 
    // and the Content-Type and Content-Disposition are set as indicated.

    // Date: Wed, 23 Aug 2023 09:01:52 +0200 (CEST)
    // From: joe@example1.com
    // Subject: [v=EMCS.NL][a=NL****][k=****][s=0]
    // To: mary@example2.com
    // MIME-Version: 1.0
    // Content-Type: application/octet-stream; charset=us-ascii; name=6bd8dfe259b3a42c90a28a82b5fc6e77.txt
    // Content-Transfer-Encoding: Base64
    // Content-Disposition: attachment; filename=6bd8dfe259b3a42c90a28a82b5fc6e77.txt
    // Message-Id: <......>
    // 
    // <multi-line base64 encoded XML here>

    success := true

    xmlBody := "<ie:IE801 xmlns:ie=\"urn:publicid:-:EC:DGTAXUD:EMCS:PHASE4:IE801:V3.01\" xmlns:tms=\"urn:publicid:-:EC:DGTAXUD:EMCS:PHASE4:TMS:V3.01\">....</ie:IE801>"

    email := chilkat.NewEmail()

    // Add subject, TO, FROM, etc.
    email.SetSubject("[v=EMCS.NL][a=NL****][k=****][s=0]")
    email.SetFrom("joe@example1.com")
    success = email.AddTo("Mary","mary@example2.com")

    email.SetBody(xmlBody)

    email.AddHeaderField("Content-Transfer-Encoding","Base64")
    email.AddHeaderField("Content-Type","application/octet-stream; charset=us-ascii; name=6bd8dfe259b3a42c90a28a82b5fc6e77.txt")
    email.AddHeaderField("Content-Disposition","attachment; filename=6bd8dfe259b3a42c90a28a82b5fc6e77.txt")

    // Your email is ready to send
    mailman := chilkat.NewMailMan()

    mailman.SetSmtpHost("smtp.my_mail_server.com")
    mailman.SetSmtpUsername("myUsername")
    mailman.SetSmtpPassword("myPassword")
    mailman.SetSmtpPort(465)
    mailman.SetSmtpSsl(true)
    mailman.SetStartTLS(true)

    success = mailman.SendEmail(email)
    if success != true {
        fmt.Println(mailman.LastErrorText())
        email.DisposeEmail()
        mailman.DisposeMailMan()
        return
    }

    success = mailman.CloseSmtpConnection()
    if success != true {
        fmt.Println("Connection to SMTP server not closed cleanly.")
    }

    fmt.Println("Mail Sent!")

    email.DisposeEmail()
    mailman.DisposeMailMan()