For a website (site A) with hosting and domain name via Squarespace, I see that getting any email addresses for the domain name is an additional monthly fee. That is disappointing, especially since the hosting + domain already costs more through Squarespace than I pay for my website (site B)'s hosting + domain + plenty of emails I can setup on cpanel for each domain.
I would like to switch at least the domain management for site A to my other hosting account for site B, which includes email with domain names. Is it possible to do this while still hosting and editing this website through Squarespace? Would I simply transfer the domain, then the cpanel for site B will be able to add emails under the newly-transferred domain? Site A is for an organization that actively uses its website, so I want to investigate options and make for a smooth transition rather than progress through trial and error.