I had a suggestion for ojs3.4.x ,when we submit a submission send email to contributor by optional

In current version when we add contributor for a submission the ‘email’ is required . I had fixed this to optional by edit ‘\lib\pkp\classes\components\forms\publication\ContributorForm.php’ and change table in databases and so on. Now this is all fine ,but when submited will get error.So i should recode ‘SendSubmissionAcknowledgement.php’ handle method to ’
/* $submitterEmails = $submitterUsers->map(fn (User $user) => $user->getEmail());

    $otherAuthors = $event->submission
        ->getCurrentPublication()
        ->getData('authors')
        ->filter(fn (Author $author) => !$submitterEmails->contains($author->getEmail()));

    if ($otherAuthors->count()) {
        $emailTemplate = Repo::emailTemplate()->getByKey(
            $event->context->getId(),
            SubmissionAcknowledgementOtherAuthors::getEmailTemplateKey()
        );

        $mailable = new SubmissionAcknowledgementOtherAuthors($event->context, $event->submission, $submitterUsers);
        $mailable
            ->from($event->context->getData('contactEmail'), $event->context->getData('contactName'))
            ->recipients($otherAuthors->toArray())
            ->subject($emailTemplate->getLocalizedData('subject'))
            ->body($emailTemplate->getLocalizedData('body'));

        Mail::send($mailable);

        /** @var SubmissionEmailLogDAO $logDao */
       /* $logDao = DAORegistry::getDAO('SubmissionEmailLogDAO');
        $logDao->logMailable(
            SubmissionEmailLogEntry::SUBMISSION_EMAIL_AUTHOR_SUBMISSION_ACK,
            $mailable,
            $event->submission
        );
    }*/'

to forbiden to send email to contributor’s.If use OJS 3.4.0.4 all person will get a email ,after 3.4.0.5 there have a ‘if’ to judge hao to send email but it do not justified.The best way is that checked if this user had configed email then make decision