Returns the email history the platform keeps for a contact or a deal: one-to-one emails sent from the platform, emails from a connected mailbox (synced in, or sent through it), and campaign emails sent to the contact. reltype says which kind each entry is. Send filters[subscriberid] or filters[dealId]; without either, the read covers every email on the account. With filters[subscriberid], the request first adds any of the contact's emails sent since the last read, then returns the entries. With filters[dealId], it does the same for the deal and its contacts, and returns the emails of the deal's contacts that are tied to this deal or to no deal; users without deal access then see only the emails tied to no deal. Each email appears once. Emails from a connected mailbox that are marked private are returned only to the user they belong to. Subjects have personalization tags filled in, and message bodies have the mailbox service's open-tracking pixel removed, so showing them does not count as an open. Results are paged: limit defaults to 20 and is capped at 100, page with offset, and meta.total is the number of matching emails. This endpoint is read-only.