Change Domain in Zoho Mail - DKIM Problem

Change Domain in Zoho Mail - DKIM Problem

I changed the domain linked in my Zoho Mail account in gustavofsantos.com.br to gustavofernandes.com.br however I can not activate DKIM, I created the TXT entry however the field is not validated tried to create in the previous domain gustavofsantos.com. br and has been validated however can not keep setting this way since I do not intend to keep this domain.