Just as a quick note, I would do:
my @addrs = split /\n/, $email_list;
my @addrs_invalid
= grep { not Email::Valid->address($_) }
@addrs;
print 'The following Email addresses are invalid:<ul>'
. (map { '<li>' . $_ . '</li>' } @addrs_invalid)
. '</ul>';
Untested and only proof of concept (no encoding and stuff), of course ;)
Ordinary morality is for ordinary people. -- Aleister Crowley
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