You should check out a module called Email::Find, it will match email addresses in a string, and uses Email::Valid underneath to validate each match.

Here is some sample code that matches email addresses in a string, and pushes each of them onto an array. All you'll have to do is check to make sure that @MATCHES has only a single element, then you know the user has submitted one email address.

In reply to (dkubb) Re: (2) Checking on multiple email addresses in a string by dkubb
in thread Checking on multiple email addresses in a string by c

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