Tcl

Read Delivery-Status Fields from a Bounce

Demonstrates the Chilkat Email.GetDeliveryStatusInfo method, which returns a named field from the message/delivery-status part of a delivery-status notification (DSN). It should be called only for an email identified as a delivery-status notification. This example loads a bounce message and reads its Action, Status, and Final-Recipient fields.

Background: When a message can't be delivered, the mail system returns a bounce as a multipart/report whose message/delivery-status part carries machine-readable fields: Action (e.g. failed), Status (a numeric code like 5.1.1 meaning "no such mailbox"), and Final-Recipient (the address that failed). Parsing these lets a program automatically detect hard bounces and prune bad addresses from a mailing list.

Chilkat Tcl Downloads

Download Chilkat for Tcl

Tcl


load ./chilkat.dll

set success 0

#  Demonstrates the GetDeliveryStatusInfo method, which returns a field from the
#  message/delivery-status part of a delivery-status notification (DSN / bounce).
#  Call it only for an email that is a delivery-status notification.

set email [new_CkEmail]

set success [CkEmail_LoadEml $email "qa_data/eml/dsn_bounce.eml"]
if {$success == 0} then {
    puts [CkEmail_lastErrorText $email]
    delete_CkEmail $email
    exit
}

#  Read individual fields from the message/delivery-status part.
puts "Action: [CkEmail_getDeliveryStatusInfo $email Action]"
puts "Status: [CkEmail_getDeliveryStatusInfo $email Status]"
puts "Final-Recipient: [CkEmail_getDeliveryStatusInfo $email Final-Recipient]"

#  Note: The path "qa_data/..." is a relative local filesystem path,
#  relative to the current working directory of the running application.

delete_CkEmail $email