bill cole wznfvpntxiwv823303billmailscconsultcom 1117 pm 0700 3508 joseph l casale wrote rh pks book postfix page 62 claim recipient specified header used restricting messages yet recipient defined envelop actual recipients message delivered looking copy message one deduce envelop recipient vs header recipient header recipients easily determined looking message theres header addresses envelope recipients always shown headers although may clause one received headers identifying envelope recipient postfix also adds xoriginalto header circumstances envelope recipient copy message except rare mta cases including postfix individual copy message wont ever show envelope recipients bill cole ydpuscconsultcom fri 08 aug 2008 070119 0500 header vs recipient defined envelop