The Re Mod should look something like this:
RewriteEngine On
RewriteCond %{HTTP_HOST} ^secondary.domain$ [NC]
RewriteRule (.*)$ secondary.domain/$1 [R=301,L]
LastMitch
Industrious Poster
4,181 posts since Mar 2012
Reputation Points: 132
Solved Threads: 335
Skill Endorsements: 45