I am trying to send mail using mailx in my shell script to users without disclosing email addresses.

This is my piece of code -

```
query1=$(sqlplus -s ${ORA_UID_PSWD} << 'EOF'
set heading OFF
SELECT cu.cntct_email
        FROM cm_user cu, cm_usertype ct
        WHERE trunc(cu.xprtn_dt) = trunc(sysdate) - 60
        AND cu.cm_user_id=ct.cm_user_id
        AND ct.user_type = 'E'
        AND cu.cntct_email is not null;
EOF
)
user_list1=$(echo "$query1" | tr '\n' ',' | sed 's:^.\(.*\).$:\1:')
echo $user_list1
echo -e "Hi,\nFYI.. Your password is expired 60 days ago. Please login and get it reset.\n\nThanks" |mailx -s "Password expired" -b $user_list1

```

I tried using `-b` option(BCC), but I am getting error as -

> 
> Send options without primary recipient specified.
> 
> 
> 

Usage: 

```
mailx -eiIUdEFntBDNHRV~ -T FILE -u USER -h hops -r address -s SUBJECT -a FILE -q FILE
      -f FILE -A ACCOUNT -b USERS -c USERS -S OPTION users

```

Anybody know how can I send without using To(Primary reciepnt)