Improving Email Accuracy: Tips for Correct Recipient Identification

im struggling with a lot of my emails going to the wrong person or the person no longer works for the company Getting emails like this “Thank you for your email. Melanie is no longer with Sippel and unfortunately can no longer answer your email. Please direct your inquiries to ________________ She will be happy to assist you. Please note that your email will not be forwarded automatically.” I am running this waterfall enrichment attached below - Anybody have any advice to make sure that my emails are going to the right people? Maybe adding another enrichment? Thanks in advance