Here is a way to implementing 301 redirect on your domains using htaccess.

Insert the following code into your .htaccess file.

RewriteEngine On
# redirect to preferred www domain
RewriteCond %{HTTP_HOST} .
RewriteCond %{HTTP_HOST} !^www\.example\.com
RewriteRule (.*) http://www.example.com/$1 [R=301,L]

Just replace “example.com” for your own domain.