Someone tried to register for an event with a hyphenated last name. Her email address is firstname.lastname@example.org. CiviCRM says "Please enter a valid email address" and will not allow her to register.
How can I allow hyphens to be passed through Event Registration and mailing list signups?
I am running CiviCRM 5.23.3 with MySQL 8.0.18 and PHP 7.3.14.
Thank you for your assistance!