Hello, We develop a system with the validate plugin for all client side validation and I see that the email validation in the core of the plugin accept special characters like "รง" and "/". I make a alternative validation for e-mail using the specification RFC 2822 strict - http://www.rfc-editor.org/rfc/rfc2822.txt
We called in the company restrictEmail: /* Email validation that follows the restrict RFC 2822 pattern*/ jQuery.validator.addMethod("restrictEmail", function(value, element) { return this.optional(element) || /^[\w-]+(\.[\w-]+)*@(([A-Za-z\d][A- Za-z\d-]{0,61}[A-Za-z\d]\.)+[A-Za-z]{2,6}|\[\d{1,3}(\.\d{1,3}){3}\]) $/.test(value); }, "Invalid E-mail"); I thought this should be considered in next versions of validate or even the main email validation be more accurate for special characters. I hope it helps, Alexandre Magno Web Developer http://blog.alexandremagno.net