I'm trying to block certain domains from being accepted as an email.
I have looked online and found many answers but I cannot make them to work on my website
My current syntax is:
^(.+@)(?!domain_a|domain_b\.com)([A-Za-z0-9]+\.com)$
It works on a regex checker but fails on the site itself.
Found the answer, maybe it is specific to the CMS, but the requirement was to add:
regexp=^/(.+@)(?!domain_a|domain_b.com)([A-Za-z0-9]+.com)$/^