The Postfix LMTP server does not perform final delivery. You are welcome to provide pointers to the email RFCs that say that Postfix is nevertheless responsible for adding final delivery message headers.
The lmtp_assume_final feature does not make Postfix responsible
for final delivery. It modifies the behavior of delivery status
notifications sent by Postfix, such that they report "delivered"
instead of "relayed".
Wietse
