@futurebird Done that now.
I would like to be free of Google, but it has me locked in in several annoying and frustrating ways. A notable one is that mail from my main mail address (which is not self hosted but close in some ways) simply does not get through if I send it to some addresses that have (presumably) a hidden Google based backend (or possibly Microsoft, can't tell from my side), which is completely unacceptable when communicating with my child's school (and at the time I first had to provide another address to get around this I had Covid and was not really in a state to spend a lot of time and energy on a better solution).