On Wed, Apr 06, 2016 at 01:38:46PM +0000, chaouche yacine wrote: > maildrop unix - n n - - pipe > flags=DRhu user=vmail argv=/var/vmail/maildropwrapper -V9 -d ${recipient}
http://www.postfix.org/pipe.8.html user=username:groupname Execute the external command with the user ID and group ID of the specified username. The software refuses to execute com- mands with root privileges, or with the privileges of the mail system owner. If groupname is specified, the corresponding group ID is used instead of the group ID of username. Note, that pipe(8) is not the "login" program and does not execute programs with all the group memberships of the specified user. Only the primary group, or the explicitly selected "groupname" is available. -- Viktor.