Xojo Plugin

Count the Messages in a multipart/digest Email

See more Email Object Examples

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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Dim success As Boolean
success = False

//  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.

Dim email As New Chilkat.Email

//  Load a multipart/digest email (a single email that bundles many messages).
success = email.LoadEml("qa_data/eml/digest.eml")
If (success = False) Then
    System.DebugLog(email.LastErrorText)
    Return
End If

Dim n As Int32
n = email.NumDigests
System.DebugLog("NumDigests = " + Str(n))

//  Retrieve each bundled message as its own Email object.
Dim digestEmail As New Chilkat.Email
Dim i As Int32
For i = 0 To n - 1
    success = email.GetDigestEmail(i,digestEmail)
    System.DebugLog("Digest " + Str(i) + " subject: " + digestEmail.Subject)
Next

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