Privacy oriented email service suggestion other than Proton, Tuta, and Posteo

[PaleCrow55]

You (maybe?) could use SimpleLogin to handle custom domain addresses forwarded to a Posteo inbox. Though this thread suggests that that might not work for some reason.

Using Posteo w/a Custom Domain?

I use SimpleLogin with a custom domain and it’s tied to my Proton inbox. It works fine. The previous poster (biwa) said it doesn’t work properly when using his Posteo inbox. I wondered if this was still the case - SimpleLogin not working properly with your own domain using Posteo as the connected inbox.