Returns the message's per-recipient delivery state as a cursor page: each entry is one `to`/`cc`/`bcc` recipient with its role, current `status`, rejection or bounce detail when delivery failed, and open/click counts. Use it to see which specific addresses failed when the aggregate message `status` is mixed (for example `partial_failure`). ID of the message whose recipients to list, from the send response's `id` field (`em_`-prefixed). Maximum number of items to return per page. Cursor from the `next_cursor` field of a previous list response. Returns items immediately after the cursor position in the current sort order. Cursor from the `prev_cursor` field of a previous list response. Returns items immediately before the cursor position in the current sort order. Page of recipient objects for this email send. Recipient ID. ID of the parent message (em_ prefix) or broadcast (eb_ prefix) this recipient belongs to. How this recipient appeared in the send request. Possible values: `to`, `cc`, `bcc` Recipient email address. Display name provided for this recipient on the send, or null if none was given. Delivery status for this recipient. `accepted` means Bird has the send and is preparing to deliver; `processed` means the message was handed to the delivery pipeline for this recipient; `deferred` means the recipient's mailbox provider asked Bird to retry and delivery attempts continue; `delivered` means the recipient's mail server accepted the message; `bounced` means delivery permanently failed (see `bounce_type` for hard vs soft); `complained` means the recipient reported the message as spam; `rejected` means Bird did not attempt delivery (see `rejection_reason` for why). Possible values: `accepted`, `processed`, `deferred`, `delivered`, `bounced`, `complained`, `rejected` Present on `status: rejected` rows. Specifies why the recipient was rejected: - `recipient_suppressed`: the recipient is on the workspace suppression list. Bird did not attempt delivery. - `transmission_failed`: the message could not be transmitted for delivery. - `generation_failure`: the message could not be built for delivery (template or content issue). - `policy_rejection`: the message was refused by sending policy. - `domain_unverified`: the sending domain was not verified. - `quota_exceeded`: the organization's send quota was reached. - `recipient_not_allowed`: a recipient was not permitted for this send (for shared onboarding-domain sends, recipients must be verified workspace members). Possible values: `recipient_suppressed`, `transmission_failed`, `generation_failure`, `policy_rejection`, `domain_unverified`, `quota_exceeded`, `recipient_not_allowed`, `null` Bounce classification for `bounced` and `deferred` rows, or null when the recipient has not bounced or the receiving server's response has not been classified. `hard` is a permanent failure (invalid address or non-existent domain). `soft` is a transient failure (mailbox full, server temporarily unavailable). `block` indicates the receiving mail server blocked the sending IP for reputation reasons. `admin` indicates an administrative refusal (relaying denied, blocklisted domain). `undetermined` is used when the receiving server's response is ambiguous. Possible values: `hard`, `soft`, `undetermined`, `admin`, `block`, `null` SMTP reply code returned by the receiving mail server for `bounced` and `deferred` rows, or null when none was provided. Human-readable reason the receiving mail server gave for the bounce or deferral, or null when none was provided. When Bird processed the message and queued it for delivery to the recipient's mail server, or null if not yet processed. When the recipient's mail server accepted the message, or null if not yet delivered. Time between Bird accepting the send and processing the message for delivery, in milliseconds. Null until processed. Time between Bird processing the message and the receiving mail server accepting it, in milliseconds. Null until delivered. End-to-end accept → delivered time for this recipient, in milliseconds. Null until delivered. Number of open events for this recipient. Number of click events for this recipient. Cursor for the next page. Pass back as `starting_after` to advance forward. Null when no next page exists. Cursor for the previous page. Pass back as `ending_before` to step backward. Null when no previous page exists. Refresh anchor. Pass back as `ending_before` later to fetch items that have appeared since this response. Non-null whenever `data` is non-empty; null only on an empty page. Distinct from `prev_cursor`.