Both the registered domain and shared/dedicated IP address are factors in determining email reputation. For example, see: https://www.mailgun.com/blog/domain-i

Both the registered domain and shared/dedicated IP address are factors in determining email reputation. For example, see: https://www.mailgun.com/blog/domain-ip-reputation-gmail-care-more-about/ https://www.mailgun.com/blog/domain-ip-reputation-gmail-care... I've never heard about TLD being a factor, but who knows? It's possible.