postfix-3.6-20201025 has a preliminary implementation to limit the envelope senders that a local user may specify to the Postfix sendmail (or postdrop) command. The real work is done in a library module, so that similar functionality can later be added to the Postfix SMTP daemon.
Source: http://ftp.porcupine.org/mirrors/postfix-release/index.html Manual: http://www.porcupine.org/postfix-mirror/postconf.5.html#local_login_sender_maps I still need to add some credits to the HISTORY file, and update the RELEASE_NOTES file with a feature summary. Wietse
