by Pierre-André Boissinot on WordPress.org
This plugin detects if a visitor is using some old version of Internet Explorer and suggests to upgrade to a recent browser.

Here is what a visitor with an old version of IE will see when the plugin is activated
This plugin detects if a visitor is using some old version of Internet Explorer and suggests to upgrade to a recent browser.
The versions to block can be configured in an admin panel.
Works for blocking IE6, IE7 and IE8.
Localisation of the plugin into french.