Visual FoxPro

Count the Report Parts in a multipart/report Email

Demonstrates the read-only Chilkat Email.NumReports property, which is the number of report parts in a multipart/report email. A part is counted as a report when its Content-Type is message/* (except message/rfc822) or text/rfc822-headers. Use GetReport to retrieve the body of each report part; indexes are zero-based. This example loads a report email and prints each report part.

Background: When a message can't be delivered, the mail system usually sends back a bounce known as a Delivery Status Notification (DSN). DSNs use the multipart/report structure, which bundles several parts: a human-readable explanation, a machine-readable message/delivery-status part describing exactly what happened (recipient, status code, failing server), and often the original message's headers. Reading these report parts lets a program automatically detect and process bounces.

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LOCAL lnSuccess
LOCAL loEmail
LOCAL n
LOCAL i

lnSuccess = 0

*  Demonstrates the read-only Email.NumReports property, which is the number of report
*  parts in a multipart/report email (for example, a Delivery Status Notification).
*  Use GetReport to retrieve the body of each report part.  Indexes are zero-based.

loEmail = CreateObject('Chilkat.Email')

*  Load a multipart/report email (such as a bounce / DSN message).
lnSuccess = loEmail.LoadEml("qa_data/eml/dsn_bounce.eml")
IF (lnSuccess = 0) THEN
    ? loEmail.LastErrorText
    RELEASE loEmail
    CANCEL
ENDIF

n = loEmail.NumReports
? "NumReports = " + STR(n)

FOR i = 0 TO n - 1
    ? "---- Report " + STR(i) + " ----"
    ? loEmail.GetReport(i)
NEXT

RELEASE loEmail