There's a lot of misunderstanding around domain reputation when it comes to email sending and email deliverability. Domain reputation is a thing, and it does relate to email and email deliverability, and it is important. For example, it is absolutely the case that if example.com starts spamming, inbox providers are going to start putting example.com's email in the junk folder, or maybe even block it altogether. But still, domain reputation is not what a lot of people think that it is.
