How to save UTM tag when redirecting via .htaccess?

Question

htaccess

I have redirect set up via htaccess:

RewriteEngine On 
RewriteCond %{HTTP_HOST} (.*) 
RewriteRule (.*) http://site.ru/$1 [R=301,L]

How to make sure that the utm-tag, by which a person came, is preserved after a redirect to a new domain?

Answer 1

Use the QSA flag :

RewriteEngine On 
RewriteCond %{HTTP_HOST} (.*) 
RewriteRule (.*) http://site.ru/$1 [R=301,L,QSA]