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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?

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up vote 1 down vote accepted

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.

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looks good, I've deployed it where needed. Will see if it resolves issues. – Alex Older Feb 28 '12 at 15:00

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