Affects Version/s: 4.5.4.017
Fix Version/s: 188.8.131.52
Sprint:May 2018 Sprint
E.g. "Test@example.com" fails and triggers the JS pop-up. "firstname.lastname@example.org" validates fine.
Here's the line from the code (it's not too special):
<cfinput name = "email" type = "text" value = "" maxlength = "90" validate="email" required="yes">