If email is business critical, you do it. I work for a pretty small company and we do stuff like this. We have a sender tool that gives us a static sender IP, r

If email is business critical, you do it. I work for a pretty small company and we do stuff like this. We have a sender tool that gives us a static sender IP, reports deliverability, click rates and at least estimates open rates. We also have a tool to estimate the quality of a newsletter sign up email address and not collect any disposable emails.