SR-B84855 · Issue 339079
Clarification on DSN Thread Topic parsing
Resolved in Pega Version 7.4
The PDN article regarding parsing DSN emails incorrectly stated that "If the message triggers a DSN, the Thread-Topic value is still intact. You can map the value from this header to a utility named parseThreadTopicHeader in the Message Header section on the Request tab. Be sure to specify the pyInboundEmail page property in the Map To Key field." In actuality, the Thread topic is not intact for all domains; it depends on the email provider. If the thread topic is not present in the DSN mail header, custom logic will need to be added in the email service activity rule to get it from the mail content.