.htaccess - htaccess redirect url with domain as variable to an external site -

i want redirect

http://example.com/report?domain=dollarshaveclub.com 

to

http://www.semrush.com/info/dollarshaveclub.com+%28by+organic%29 

i've tried:

rewriteengine on rewritebase / rewritecond %{query_string} ^?domain=$ rewriterule ^report$ http://www.semrush.com/info/$1+%28by+organic%29 [r=301,l] 

but i'm not getting anywhere...what try next?

you must remove r=301, part.

this works me:

rewriteengine on rewriterule ^report$ http://www.semrush.com/info/$1+%28by+organic%29 [nc]