Cron mail is not delivered, but can from command line

Question

Hello, I have a strange problem with cron and sendmail that I cannot understand.
On my Solaris hosts, running Solaris 9 and 10, I have setup sendmail to masquerade to a Solaris zone acting as a mail relay.
This works fine, I can send mail from the command line using, for example:
# /usr/bin/cat somefile | /usr/bin/mailx -s "test message" usernameAs I said, on all hosts, this works fine.
When I add the above command to a cron job, to email me a log for example, the mail is not deliverable and comes back to me (an alias as root).
Is this a mailx/cron thing or am I missing something??
I have copied the sendmail.cf file from a working machine to one of the ones with a problem and still the same problem exists.
My config file (relay.mc) for sendmail is as follows on each host that attempts to use the relay:
divert(-1)
# Copyright (c) 1983 Eric P. Allman
# Copyright (c) 1988, 1993
#       The Regents of the University of California.  All rights reserved.
# Copyright (c) 1997-2000
#       Sun Microsystems, Inc.  All rights reserved.
# ident "@(#)subsidiary.mc      1.10    00/12/14 SMI"
#  This is a configuration file for SunOS 5.8 (a.k.a. Solaris 8) and later
#  subsidiary machines.  It has support for local and SMTP mail.  The
#  SMART_HOST macro is enabled, which means that messages will be sent to
#  the SMART_HOST, which is set to mailhost.$m ($m is the local domain).
#  A short-cut rule is also defined, which says if the recipient host is
#  in the local domain, send to it directly instead of the smart host.
#  Note: if you do not need a smart host; i.e., you are in an environment
#  where MX records are properly defined, then you should not be using
#  this subsidiary config file; use main instead.
#  If you want to customize this further, copy it to a name appropriate
#  for your environment and do the modifications there.
divert(0)dnl
VERSIONID(`@(#)subsidiary.mc    1.10 (Sun) 12/14/00')
OSTYPE(`solaris8')dnl
DOMAIN(`solaris-generic')dnl
define(`SMART_HOST', `mailhost$?m.$m$.')
FEATURE(`masquerade_envelope')
MASQUERADE_AS(`domain.com')
MAILER(`local')dnl
MAILER(`smtp')dnl
define(`MAIL_HUB', `mailhost.domain.com')
define(`SMART_HOST', `mailhost.domain.com')
LOCAL_NET_CONFIG
R$* < @ $* .$m. > $*    $#esmtp $@ $2.$m $: $1 < @ $2.$m. > $3Any advice would be greatly appreciated
Thank you!

Answer 1

What's the mail error you get? Any meaningful or pertinent output in system/mail logs?