RewriteRule in .htaccess

blocking MSIE user agents and sending them to the site http://ieblock.html using a RewriteCond and RewriteRule in .htaccess file.

[snipping s9y stuff]
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_USER_AGENT} .*MSIE.* [NC]
RewriteRule ^(.*) ieblock.html [L]
[snipping more s9y stuff]
RewriteRule (.*.html?&!^impressum.html&!^ieblock.html) index.php?url=/$1 [L,QSA].oO(tho I'm not sure if you actually need to explicitly allow access here again, I might give it a shot later)

#anti-spamhosts
SetEnvIfNoCase Referer .biz spammer=yes
SetEnvIfNoCase Referer 6q.org spammer=yes
SetEnvIfNoCase Referer 8gold.com spammer=yes
SetEnvIfNoCase Referer 911easymoney.com spammer=yes
SetEnvIfNoCase Referer best-xp-software.biz spammer=yes
SetEnvIfNoCase Referer canadianlabels.net spammer=yes
SetEnvIfNoCase Referer chat-nett.com spammer=yes
SetEnvIfNoCase Referer condodream.com spammer=yes
SetEnvIfNoCase Referer crepesuzette.com spammer=yes
SetEnvIfNoCase Referer crescentarian.net spammer=yes
SetEnvIfNoCase Referer debt-help-bill-consolidation-elimination.com spammer=yes
SetEnvIfNoCase Referer fidelityfunding.net spammer=yes
SetEnvIfNoCase Referer flafeber.com spammer=yes
SetEnvIfNoCase Referer freakycheats.com spammer=yes
SetEnvIfNoCase Referer future-2000.net spammer=yes
SetEnvIfNoCase Referer gb.com spammer=yes
SetEnvIfNoCase Referer highprofitclub.com spammer=yes
SetEnvIfNoCase Referer houseofsevengables.com spammer=yes
SetEnvIfNoCase Referer learnhowtoplay.com spammer=yes
SetEnvIfNoCase Referer mediavisor.com spammer=yes
SetEnvIfNoCase Referer newtruths.com spammer=yes
SetEnvIfNoCase Referer nutzu.com spammer=yes
SetEnvIfNoCase Referer oiline.com spammer=yes
SetEnvIfNoCase Referer onlinegamingassociation.com spammer=yes
SetEnvIfNoCase Referer online-----poker.com spammer=yes
SetEnvIfNoCase Referer popwow.com spammer=yes
SetEnvIfNoCase Referer psxtreme.com spammer=yes
SetEnvIfNoCase Referer ronnieazza.com spammer=yes
SetEnvIfNoCase Referer royalmailhotel.com spammer=yes
SetEnvIfNoCase Referer spoodles.com spammer=yes
SetEnvIfNoCase Referer sportsparent.com spammer=yes
SetEnvIfNoCase Referer smsportali.net spammer=yes
SetEnvIfNoCase Referer stmaryonline.org spammer=yes
SetEnvIfNoCase Referer terashells.com spammer=yes
SetEnvIfNoCase Referer tigerspice.com spammer=yes
SetEnvIfNoCase Referer thatwhichis.com spammer=yes
SetEnvIfNoCase Referer tmsathai.org spammer=yes
SetEnvIfNoCase Referer uaeecommerce.com spammer=yes
SetEnvIfNoCase Referer yelucie.com spammer=yes

SetEnvIfNoCase Referer card spammer=yes
SetEnvIfNoCase Referer casino spammer=yes
SetEnvIfNoCase Referer holdem spammer=yes
SetEnvIfNoCase Referer phentermine spammer=yes
SetEnvIfNoCase Referer pills spammer=yes
SetEnvIfNoCase Referer poker spammer=yes
SetEnvIfNoCase Referer profit spammer=yes
SetEnvIfNoCase Referer texas spammer=yes

deny from env=spammer