Email Message
interface EmailMessage {
id: string;
account_id: string;
hostname: string;
direction: "in" | "out";
from_contact: EmailContact;
reply_to_contacts: EmailContact[];
to_contacts: EmailContact[];
cc_contacts: EmailContact[];
bcc_contacts: EmailContact[];
subject: string;
body_text: string;
body_html: string;
received_at: string | null;
sent_at: string | null;
}