PowerBuilder

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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integer li_rc
integer li_Success
oleobject loo_Email
integer n
integer i

li_Success = 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.

loo_Email = create oleobject
li_rc = loo_Email.ConnectToNewObject("Chilkat.Email")
if li_rc < 0 then
    destroy loo_Email
    MessageBox("Error","Connecting to COM object failed")
    return
end if

//  Load a multipart/report email (such as a bounce / DSN message).
li_Success = loo_Email.LoadEml("qa_data/eml/dsn_bounce.eml")
if li_Success = 0 then
    Write-Debug loo_Email.LastErrorText
    destroy loo_Email
    return
end if

n = loo_Email.NumReports
Write-Debug "NumReports = " + string(n)

for i = 0 to n - 1
    Write-Debug "---- Report " + string(i) + " ----"
    Write-Debug loo_Email.GetReport(i)
next


destroy loo_Email