Suppress some error notifications

I have a client who is using this plugin, and whenever someone fills out a form on their site and enters their own email incorrectly, the system will try to send them an notification email, it will be deliverable, and the admin will get a notification.

For example, if someone enters [email protected] or [email protected]. Is there a way to suppress reply-to errors from being notified, either in the settings or with a hook?