regex - URL Rewrite: how to remove email parameters from an URL in Apache? -

how can remove email parameters url on apache server using rewrite rule?

basically need strip out whatever email parameter present in url, example:

 www.example.com/?param_name=nobody@example.com 

will rewritten as

www.example.com/ 

or

 www.example.com/?param_name_1=not_an_email&param_name_2=nobody@example.com 

to

 www.example.com/?param_name_1=not_an_email 

try these rules:

rewriteengine on rewritecond %{query_string} ^(.+|)?&[^=]*=[a-za-z0-9._%+-]+@[a-za-z0-9.-]+\.[a-za-z]{2,4}((?:&(.*))|)$ rewriterule (.*) $1?%1%2 [nc,l]  rewritecond %{query_string} ^[^=]*=[a-za-z0-9._%+-]+@[a-za-z0-9.-]+\.[a-za-z]{2,4}$ rewriterule (.*) ? [nc,l]  rewritecond %{query_string} ^[^=]*=[a-za-z0-9._%+-]+@[a-za-z0-9.-]+\.[a-za-z]{2,4}(&|)((?:&(.*))|)$ rewriterule (.*) $1?%1%3 [nc,l] 

tested here

the first rule matches query strings there other parameters both before , optionally after email address, e.g:

www.example.com/?param_name_1=not_an_email&param_name_2=nobody@example.com 

or

www.example.com/?param_name_1=not_an_email&param_name_2=nobody@example.com&param_name_3=not_an_email 

the second rule matches query strings consisting of single parameter email address, e.g:

www.example.com/?param_name=nobody@example.com 

the third rule matches query strings email adress first parameter , other parameters follow, e.g:

www.example.com/?param_name_1=nobody@example.com&param_name_2=not_an_email 

it matches 1 email address maximum. regex matching email address here.