workspace_mailbox_unavailable
HTTP 422 / 409§9.19 Business mail and messaging
The chosen mail connection or mailbox is not a live Gmail/Outlook mailbox of this connection (409 when an existing reply's connection was removed).
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/workspace_mailbox_unavailable",
"title": "…",
"status": "…",
"detail": "…",
"instance": "/v1/…"
}