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Count the Messages in a multipart/digest Email

Demonstrates the read-only Chilkat Email.NumDigests property, which is the number of message/rfc822 parts contained within a multipart/digest enclosure. If no such enclosure exists, the value is 0. Digest indexes are zero-based; use GetDigestEmail to retrieve an individual bundled message as its own Email object. This example loads a digest email and lists each message's subject.

Background: A multipart/digest is a way to package many separate emails inside one carrier message — historically used by mailing lists to send a single daily "digest" containing all of that day's posts. Each bundled item is a complete message/rfc822 email with its own headers and body. This differs from NumAttachedMessages, which counts nested messages attached to an ordinary email rather than the members of a digest enclosure.

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llSuccess = .F.

//  Demonstrates the read-only Email.NumDigests property, which is the number of
//  message/rfc822 parts contained within a multipart/digest enclosure.  If there is no
//  multipart/digest enclosure, the value is 0.  Digest indexes are zero-based.

loEmail = createobject("CkEmail")

//  Load a multipart/digest email (a single email that bundles many messages).
llSuccess = loEmail.LoadEml("qa_data/eml/digest.eml")
if (llSuccess = .F.) then
    ? loEmail.LastErrorText
    release loEmail
    return
endif

n = loEmail.NumDigests
? "NumDigests = " + str(n)

//  Retrieve each bundled message as its own Email object.
loDigestEmail = createobject("CkEmail")

for i = 0 to n - 1
    llSuccess = loEmail.GetDigestEmail(i,loDigestEmail)
    ? "Digest " + str(i) + " subject: " + loDigestEmail.Subject
next

//  Note: Paths such as "qa_data/..." are relative local filesystem paths,
//  relative to the current working directory of the running application.


release loEmail
release loDigestEmail