Connecting Two Zoho Accounts

Connecting Two Zoho Accounts

I'm having trouble connecting my two zoho accounts through the POP [POP3?] system.  I provide the information for my second account, the server and whatnot, but I am requested to create a new account, as the account I am trying to connect is already taken.

I know the account I'm trying to connect is already taken.  It's my account.  I'd like to connect the accounts so I can look one list of emails rather than having to do the log-in-log-out tango.

I'm not sure what I'm doing wrong.  I hold a free account, which means I should be able to connect up to 5 emails.  However, I'm obviously missing something or missing a step that's making it so I can't even connect two already made accounts.

Help is most appreciated!  Thank you for your time.