Comments system doesn't like International domains

Question

Morning all,

I'm trying to work out why the commenting system thinks .au, .ca and a couple of other international email address are being treating as invalid.

Any ideas?

Answer 1

WordPress’ internal email validation is very weak. I’ve written a plugin some time ago to catch most cases where WordPress fails: Extend Email Checks.

It uses PHP’s filter_var(). But there are some edge cases, where it doesn’t work good enough. Give it a try.