Oh didn't notice Tutanota allowed unlimited aliases as well. From what I read OK Posteo's FAQ, Posteo doesn't allow custom domains because it would be personal information and even if you just had the MX record, it'd still be traceable in some way.
I personally create an alias for each account I create using my subdomains but have been thinking about using my custom domain a bit more. Only have my Matrix account using it lol. Was also thinking of splitting up my mailboxes a bit since each service has their own solution, but I'll see if that works for me lol.
So far the best solution for me has been using SimpleLogin since they're paid plans allow unlimited aliases and custom domains (and also comes with my Proton Unlimited subscription). I know Posteo and Tutanota have their own solutions but SimpleLogin has been more flexible in my experience. Yet to try out Posteo's and Tutanota's solutions.
Oh didn't notice Tutanota allowed unlimited aliases as well. From what I read OK Posteo's FAQ, Posteo doesn't allow custom domains because it would be personal information and even if you just had the MX record, it'd still be traceable in some way.
I personally create an alias for each account I create using my subdomains but have been thinking about using my custom domain a bit more. Only have my Matrix account using it lol. Was also thinking of splitting up my mailboxes a bit since each service has their own solution, but I'll see if that works for me lol.