Jon Miller:
> Jun 24 00:18:23 mmtlnx postfix/smtp[7455]: fatal: unknown service: smtp/tcp
Try turning off chroot operation in master.cf.
A common mistake is to turn on chroot operation in the master.cf
file without going through all the necessary steps to set up a
chroot environment. This causes Postfix daemon processes to fail
due to all kinds of missing files.
The example below shows an SMTP server and client that are configured
with chroot turned off:
/etc/postfix/master.cf:
# =============================================================
# service type private unpriv chroot wakeup maxproc command
# (yes) (yes) (yes) (never) (100)
# =============================================================
smtp inet n - n - - smtpd
smtp unix - - n - - smtp
Inspect master.cf for any processes that have chroot operation not
turned off. If you find any, save a copy of the master.cf file,
and edit the entries in question. After executing the command
"postfix reload", see if the problem has gone away.
If turning off chrooted operation made the problem go away, then
congratulations. Leaving Postfix running in this way is adequate
for most sites. If you prefer chrooted operation, see the Postfix
BASIC_CONFIGURATION_README file for information about how to prepare
Postfix for chrooted operation.
See also: http://www.postfix.org/DEBUG_README.html#no_chroot
Wietse