Disable user to use sendmail

[j773303]

Is it possible to disable some user can't use sendmail for sending and receiving mail ?? Thanks.

[Marcel Boogert_1]

Hi there,

Not by my knowledge, but you can try the following workaround:

you can make a file called sendmail under the users home-dir and put some text in it that the user isn't authorized. Next thing is to chown root:sys and the chmod 505 on the newly created file. Next is to make sure the users home-dir is the first search path in the $PATH variable.

MB.

[Muthukumar_5 · Accepted solution]

we are not any configuration files to allow / deny the user to access the sendmail. So we have to do programming as,

move the origial sendmail binary /usr/bin/sendmail to /usr/bin/sendmailorg

Make a script as,

#!/usr/bin/ksh

ALLOW_USER="root test user"

index=0
while [[ $index -lt ${#ALLOW_USER[*]} ]]
do

if [[ "$(who -m | awk '{ print $1 }')" != "${ALLOW_USER[$index]}" ]]
then

echo "You are not allowed to execute sendmail"
exit 1
else

echo "/usr/bin/sendmailorg $*" | sh

fi

let index=index+1
done

You can use configuration of users allow as,

/etc/mail/sendmail.allow file name

Put the name's there and read the user's from there on script too.

[Michael_356]

Hi there,

You can prohibit users from sending mail by adding them the the /etc/mail/access

Regards

Michael

[Muthukumar_5]

oops. Try to move the new script as /usr/bin/sendmail there so that new script will be executed instead of original sendmail binary.

new script checks user and give the access to use original binary. And more it is good to change sendmail* name on /usr/bin/ location so that other user's directly access them