Disabling sendmail daemon (SMTP) on solaris 10

The sendmail daemon runs on port 25 and is enable by default on solaris boxes.
The sendmail daemon is not needed to be running on servers which are meant to be mail clients. To disable sendmail service use below steps:-

1. Edit /etc/default/sendmail . Create the file if its not already there and include the following values:
MODE=Ac
QUEUEINTERVAL=”15m”

2. Stop the sendmail service 
/etc/init.d/sendmail stop

3. Now edit /etc/sendmail/submit.cf

and change the line shown here: D{MTAHost}[127.0.0.1]
to :
D{MTAHost}[<ur-mail-server-ip>]

4.  Start the sendmail service.
    /etc/init.d/sendmail start

Now port 25 on localhost would be disabled and server wont be listening on that port anymore.