I am using sendmail to forward e-mail into a perl script using procmail.
I have just up graded to a new machine running sendmail version 8 and get the error above and am struggling with the tightened security.
# Take copies of all incoming mail into the archive file
# This is the normal mail handler
| /home/sysadmin/procmail/rewrite forward
# This recipe forwards any mail to "alert" if it does not come from email@example.com