outlook.com is even worse. If you bring up a mail server, you have to apply to them for permission to send them email. Doesn't matter that you have DKIM, SPF, D

outlook.com is even worse. If you bring up a mail server, you have to apply to them for permission to send them email. Doesn't matter that you have DKIM, SPF, DMARC, or that the domain is 25 years old. They don't care - you must apply through a process that ironically sends email that isn't DKIM certified in their response.