I have a server with multiple websites in same place 
Scenario is as belows
ABC/123
ABC/456
ABC/789

The 123 is pointed to www.123.com
The 456 is pointed to www.456.com
The 789 is pointed to www.789.com


now i want www.123.com redirected to 123.com.

i added below code in htaccess file

    RewriteEngine On
    RewriteCond %{HTTP_HOST} ^www\.123\.com [NC]
    RewriteRule ^(.*)$ http://123.com/$1 [L,R=301]

But it says too many redirects detected.

Does any one have a solution to this
Joomla version is 3.6.4