The only reason I am still using gmail is due to choice paralysis. I do not know which email service to choose and pay for. I do not like Proton. Is Fastmail the way to go? There is also the German one posteo. Should I just use Apple's mail? I'm taking suggestions if you have anything to share.
The first step is to get your own domain. You can set that up in Apple Mail at first if it’s most convenient. Then you can get everything moved over. After that it’s much easier to move provider again.
Google would probably justify this as security, and not necessarily unreasonably, but it has a clear anti-competitive effect too. The security concerns would be more credible if they made it easy to debug this, like giving a useful error message back to the sender stating what the missing security criteria are and having a clear process for appeals (like if you got unlucky with an IP address, or if you are missing a specific security measure on your domain).