minecraft earth, wrong minecraft account connected to email

I tried to add my other email to my microsoft account but it says its part of a reserved domain, So i cant add it as an alternative account. So another minecraft player is using my email for their minecraft earth account and thats why i cant use it? When
i sign into minecraft earth i come up as princess.cossign which isnt me but when i play on normal minecraft everything is fine, why is there a problem all of a sudden because of playing minecraft earth? Id like to be able to use my main minecraft account on
minecraft earth and not have it come up as someone i dont knows minecraft account. I dont want my email connected to another minecraft account and i also feel bad for the the other person that they might have lost access to their account because of this mix
up or whatever it is, im so confused... please help!?

Sorry to hear it. If you're connecting to a different Minecraft world then please first log in to https://account.microsoft.com to ensure that all your account info is correct.

If you still have trouble then please contact Mojang for more help https://help.mojang.net

You can sign up for Minecraft Earth on Minecrafts website,

https://www.minecraft.net/en-us/

As for the question regarding the skin, it will be sent to the email that you setup your account with

I think it would be amazing with the new minecraft earth mobile game coming out, if you could connect that to your xbox account for achievements

I'd be happy to give more details but I am not sure about what I can add.

I have fully access to my microsoft account but I suspect that during the time where the hacker was connected to my account, he unlinked my minecraft account and my microsoft account, if its even possible.
Since then, I have to connect to my microsoft account when Im on the minecraft Launcher, and whenever I'm connected, it seems to be with the wrong account, since it asks me to buy Minecraft.

One of the questions I had is : is it possible to know which email adress is linked to a Minecraft account's name ? My Minecraft name is Iokko (iokko, not Lokko)