Many people trying to use GMail for business might not be aware that it's possible to associate your favourite long-time domain email, or even your shiny new company email to your old Google Account.
The setting can be found here: https://myaccount.google.com/privacy#personalinfo
Just add the additional permanent emails to your aliases, and it might appear something like my setup shown:
If Google says your email is already associated with another Google Account, it's no problem - so long as you still can either remember your password or still have access to the email for that account. Call Tomachi Corp today for support 0212576422.