Returns the parsed metadata for a received email: addresses, subject, threading headers, authentication results, and the attachment manifest. Content is fetched separately: the parsed body with [Get a received email's body](/docs/api/reference/get-inbound-message-body), the original MIME with [Get a received email's raw content](/docs/api/reference/get-inbound-message-raw), and attachment bytes with [Get a received email's attachment](/docs/api/reference/get-inbound-message-attachment). Received emails are retained for 30 days; an unknown or expired message returns `404`. Received message ID. Sender address parsed from the message. Email address. Display name shown alongside the address in mail clients. Recipients on the message's To header. Email address. Display name shown alongside the address in mail clients. Recipients on the message's Cc header. Email address. Display name shown alongside the address in mail clients. Subject line as received, or null when the message had no subject. RFC 5322 Message-ID header from the sender, or null when the sender did not include one. In-Reply-To header — the Message-ID this message replies to, or null when it is not a reply. References header — the chain of Message-IDs in this conversation, oldest first. Absent when the message had no References header. Conversation this message belongs to. Always null until threading is available. Whether the sender of the received message was authenticated. `pass` means the sender's identity was verified; `fail` means it was checked and did not verify; `unknown` means no verdict is available and the sender should not be treated as verified. Possible values: `pass`, `fail`, `unknown`, `null` Whether SPF passed for the sender, parsed from the message's authentication results. Null when the result did not carry an SPF verdict. Whether DKIM passed for the sender, parsed from the message's authentication results. Null when the result did not carry a DKIM verdict. Whether DMARC passed for the sender, parsed from the message's authentication results. Null when the result did not carry a DMARC verdict. Spam score for the message. Always null at present; reserved for a future content-scoring capability. Metadata for each attachment found on the message. Empty when the message had no attachments. Attachment ID, stable within the received message. Filename from the attachment's Content-Disposition, or null when the sender did not name the part. MIME type parsed from the attachment part, or null when absent. Size of the attachment in bytes. When Bird received the message.