Solaris

to="mail id"
HOSTNAME=`uname -n`
MAILFILE=/tmp/mail.txt
mail_generate() 
{
echo "
ehlo $HOSTNAME
mail from:<MailID>" > $MAILFILE
for tolist in $to
do
echo "rcpt to:$tolist" >> $MAILFILE
done
echo "
data
Date:
From: FROM MAIL ID
Subject: $SUBJECT
To:$to
Cc:
Content-Type: text
All,
  Below are the contents of message file
"  >> $MAILFILE
cat /var/adm/messages >> $MAILFILE
echo "

Regards
$HOSTNAME .
.
quit " >>  $MAILFILE

cat  $MAILFILE |telnet MAILSERVER 25 1> /dev/null 2>&1
$RM $MAILFILE
}
mail_generate