[hackerfactor1]

I was going to say the same thing.

Even if you have SPF and DKIM working correctly, they will block your email to outlook, hotmail, and other services unless you fill out their form. If you fill out the form, then you still need to wait months before they decide whether to accept your email.

On my own servers, I warn users who try to use hotmail or outlook that my email to them may not work and they should use a different email address.

[taylodl]

Now imagine you’re an electric utility trying to email customers their bills - email is a mess!