From: Wietse Venema on
> Hi all!
> i've created jail on FreeBSD system and put postifx into it.
> When i'm in jail and want to send mail i've got many such errors:
> Apr 21 16:30:49 rt postfix/postdrop[7852]: warning: mail_queue_enter:
> create file maildrop/103703.7852: Permission denied

You broke the file permissions, or your file system does not support
setuid/setgid execution.

To correct the permissions execute the command:

# postfix set-permissions

(this requires Postfix 2.1 or later).