NASA has a super interesting explanation about it here: https://svs.gsfc.nasa.gov/4709
Probes have also been taking pictures: https://en.m.wikipedia.org/wiki/Far_side_of_the_Moon
I know you are joking, but it’s super interesting to me, so I wanted to share something about it.
I have my own mailserver just for me and it wasn’t that complicated to be honest. I set it up with Mailcow in Docker in under a day. So far it has been stable with regular backups and updates through Lighthouse.
Maintenance comes down to 5 minutes every three months because somehow Let’s Encrypt and Mailcow don’t like each other and I have to renew the certificate manually.