Swift

Attach an Email to Another Email

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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Swift


func chilkatTest() {
    var success: Bool = 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.

    let innerEmail = CkoEmail()!
    innerEmail.subject = "Original message"
    innerEmail.from = "alice@example.com"
    innerEmail.body = "This is the original message being forwarded."

    let email = CkoEmail()!
    email.subject = "FW: Original message"
    email.from = "bob@example.com"
    email.body = "See the attached original email."

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

    success = email.attach(email: innerEmail)
    if success == false {
        print("\(email.lastErrorText!)")
        return
    }

    print("NumAttachedMessages = \(email.numAttachedMessages.intValue)")

}