Redirect old website / domain to new domain using htaccess

Today's task was to redirect all pages from an old domain to new domain except one page (google verification file). All pages including any query string should be stripped out and redirect to only homepage of new domain with out any query string.

This code snippet on htaccess did all the tricks:

<IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteCond %{ENV:REDIRECT_STATUS} ^$
  RewriteCond %{REQUEST_URI} !^/googleace438179b7ee2497.html$ [NC]
  RewriteCond %{HTTP_HOST} ^(www\.)?technooze\.com$ [NC]
  RewriteRule (.*)$ http://www.dltr.org/? [R=301,L]
</IfModule>