Pay attention to @code{flags}, containing @code{R}, telling Postfix to
include @code{Return-Path:} header. Otherwise that envelope sender
information may be lost. Possibly you will also need somehow to
Pay attention to @code{flags}, containing @code{R}, telling Postfix to
include @code{Return-Path:} header. Otherwise that envelope sender
information may be lost. Possibly you will also need somehow to