Apache 307 Redirect to redirect POST data
You can't match against querystring using a Redirec directive. You need to match against %{QUERY_STRING} variable using mod-rewrite. The following rule does what you want :
RewriteEngine onRewriteCond %{QUERY_STRING} ^view=account&task=paypal$ [NC]RewriteRule ^/?index\.php$ http://example.com/paypal/? [R=307,L]? at the end of the destination url is important as it avoids appending old querystring to the new url.