Attach an Email to Another Email

See more Email Object Examples

Demonstrates the Chilkat Email.AttachEmail method, which attaches a copy of another email to this email object. The attached email is encapsulated in a message/rfc822 subpart. Because a copy is attached, later changes to the source email do not affect the embedded message. This example attaches one email to another.

Background: "Forward as attachment" produces exactly this structure: the original message is embedded whole as a message/rfc822 part rather than quoted into the body. This preserves the original's headers and formatting intact, which matters for forwarding to a mailbox that will re-parse it, or for reporting spam/phishing with the original evidence attached. Such parts are counted by NumAttachedMessages.

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    success := false

    //  Demonstrates the AttachEmail method, which attaches a copy of another email to this email
    //  object.  The attached email is encapsulated in a message/rfc822 subpart.

    innerEmail := chilkat.NewEmail()
    innerEmail.SetSubject("Original message")
    innerEmail.SetFrom("alice@example.com")
    innerEmail.SetBody("This is the original message being forwarded.")

    email := chilkat.NewEmail()
    email.SetSubject("FW: Original message")
    email.SetFrom("bob@example.com")
    email.SetBody("See the attached original email.")

    //  Attach a copy of the inner email as a message/rfc822 part.

    success = email.AttachEmail(innerEmail)
    if success == false {
        fmt.Println(email.LastErrorText())
        innerEmail.DisposeEmail()
        email.DisposeEmail()
        return
    }

    fmt.Println("NumAttachedMessages = ", email.NumAttachedMessages())

    innerEmail.DisposeEmail()
    email.DisposeEmail()