Not being able to use your domain is a pretty massive downside.
The great part about email is that you can move between providers without issues. I wouldn’t want to use a posteo.de email for all my services when I don’t know if they will be around in 10 years.
True and nowadays I would take that into consideration too. But I was young when I created that account (I think it was around some leak scandal or whatever that made me move from hotmail to posteo). But it turned out to be a nice decision.
For a business email this might not be cool tho. I get that
The great part about email is that you can move between providers without issues. I wouldn’t want to use a posteo.de email for all my services when I don’t know if they will be around in 10 years.