Environment:: Domino/Linux 7.0.2FP2, Notes Windows XP 7.0.2, Return Receipts enabled, verified with templates Mail/R7 and ontfmailintDE1.5:



After installing SpamAssassin, if a received message contains an item "Disposition_Notification_To", it does not anymore get the item "Return Receipt", which seems to be necessary by Notes/Domino to handle incoming RRs correctlly.



Without SpamAssassin installed the item "Return Receipt" is added (by the router ?) and the behaviour is as exspected: queried in the UI on opening the message to send or suppress the RR.



Kind regards

Peter Pranter