Have a look at these two too:

https://posteo.de/en

https://mailbox.org/en/

both are good with only 1-Euro per month

both have pro's and con's and are are littel bit different

and the later one has a heritance solution that's pretty good

Try it with a dummy e-mail-adress for 30 days and

then go serious with registering the one's you want and need...