The emails are shown to be from “Root User <root@localhost>”

You have not specified a “From” address for the email. The steps to fix this are different for the notification email and the autoreply email, see the revelant sections below.

Notification email

Open process.php and enter an email address for the $config['from'] setting. For example:

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$config['from'] = 'company@example.com';
$config['from'] = 'company@example.com';

Autoreply email

Open process.php and enter an email address for the $config['autoreplyFrom'] setting. For example:

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$config['autoreplyFrom'] = 'company@example.com';
$config['autoreplyFrom'] = 'company@example.com';
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