Hi, i'm not using this plugin but you seems right about the problem. I can just invite you with posting in the appropriate plugin "bug" list for making the author aware of the problem.
taken from the plugin authors page: [quote] Please post bug reports and other contributions (enhancements, features, eg. new validation methods) to the jQuery bug tracker [ http://dev.jquery.com/newticket ](requires registration). Please put [validate] into the title of a ticket. [quote] Bye On 22 fév, 23:51, ymai <[email protected]> wrote: > Hello everyone > I notice that an e-mail address like > ad...@foo_bar.net > seems to be valid for jQuery Validate (http://bassistance.de/jquery- > plugins/jquery-plugin-validation/) but invalid for the PHP > "filter_var" function > (http://www.w3schools.com/PHP/func_filter_var.asp) > The underscore caracter is valid in the username but is it valid in > the domain name? > I'm afraid jQuery is wrong here.

