Yes, you can add as many email addresses as you want. This will be the same as adding a new team members to your organization / inviting a colleague.
Say, for example, you have two different email accounts that you’d like to sync for the same CRM account. All you’d need to do is:
Go to Organization > Click the invite link > Open it in an incognito window (because you are already logged into Thrive on your normal browser) > Connect your other email account
Now the email address will be linked to your organization and Thrive will start syncing for it.