multiple email addresses - one user

Hi,

I have seen variations of this question, but I cannot seem to find the right answer... so here goes!

I have several email addresses on different domain names (matt@domain1.com, matt@domain2.com, matt@domain3.com).
I have signed up to Zoho mail for the one user, multiple domains account
I added domain1.com and the user "matt@domain1.com" is set up and working nicely (love it by the way!)
I then added domain2.com but the main matt@domain1.com seems to be the main account.

Is it possible to log in to Zoho mail as one user and see multiple inboxes? I know you can filter, but I think it would get messy with 5+ email addresses? I added an alias of matt@domain2.com which is coming to the one inbox... but I would like to somehow see

domain1.com inbox

domain2.com inbox

Or is the only way to achieve this through filtering?

thank you!