> But how much time do you spend dealing with that? Is it worth it? I don't track the time but it's within a rounding error of no time at all. I set up SPF fo

> But how much time do you spend dealing with that? Is it worth it? I don't track the time but it's within a rounding error of no time at all. I set up SPF for my domains when it became popular many years ago, took maybe a few hours. Some years later I set up DKIM, that took a bit more time over a weekend. Some time later I set up DMARC as well. I haven't had to make any changes since then, it's been at least four years. No problems of any kind. It's absolutely worth it to own my own email, no question.