...it also needs to fail on anything that isn't example.com

Then just move the parens a little bit, and make the specific subdomain optional...

/@(?!bar\.)?example\.com$/

Update: Oh well, that's why it's called "free advice"

In reply to Re: Re: Re: Match all emails from all subdomains for a domain except one.. by hossman
in thread Match all emails from all subdomains for a domain except one.. by ehdonhon

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