I hosted my own mail for years. I stopped just due to inflation. I have been cutting every single cost that I can. I already pay for iCloud+ and it now supports

I hosted my own mail for years. I stopped just due to inflation. I have been cutting every single cost that I can. I already pay for iCloud+ and it now supports custom domains and the like and has encryption, so I moved my email over. If I wasn’t trying to trim every possible cost currently, I would still selfhost. It’s trivial if you have any sysadmin/syseng experience and a little time for setup. IME, the main thing that trips people up has already been mentioned. You need SPF, PTR, and DKIM records to get delivery to big providers. You can usually request to be removed from blacklists if your IP was flagged before you got it.