Count the Attached Messages in an Email

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Demonstrates the read-only Chilkat Email.NumAttachedMessages property, which is the number of embedded emails represented by message/rfc822 MIME parts. These are counted separately from ordinary attachments and related items, and their indexes are zero-based. This example builds an inner email, attaches it to an outer email as a nested message, and prints the count.

Background: When you "forward as attachment," many mail clients embed the original message as a complete nested email rather than quoting its text. In MIME this appears as a message/rfc822 part — an entire email (its own headers and body) tucked inside the carrier message. Chilkat distinguishes three kinds of enclosed content: ordinary attachments (NumAttachments), inline related items (NumRelatedItems), and these nested messages (NumAttachedMessages). Use GetAttachedEmail to pull an embedded message into its own Email object.

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    success := false

    //  Demonstrates the read-only Email.NumAttachedMessages property, which is the
    //  number of embedded emails (message/rfc822 MIME parts) contained in the email.

    //  Create an inner email that we'll attach as a complete nested message.
    innerEmail := chilkat.NewEmail()
    innerEmail.SetSubject("I am an attached message")
    innerEmail.SetBody("This entire email is nested inside another email.")
    innerEmail.SetFrom("alice@example.com")
    innerEmail.AddTo("Bob","bob@example.com")

    //  Create the outer email and attach the inner email directly as a
    //  message/rfc822 part.  AttachEmail attaches a copy of the inner email.
    email := chilkat.NewEmail()
    email.SetSubject("Outer email with an attached message")
    email.SetBody("See the attached email.")
    success = email.AttachEmail(innerEmail)

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


    innerEmail.DisposeEmail()
    email.DisposeEmail()