Batch update mailbox messages
Updates allowed message flags and keywords for up to 100 messages with state-safe conflict handling.
Authorizations
Sendmux API key. Use a root API key for Management API routes, or a mailbox credential for Mailbox API routes. Obtain keys from the dashboard under API Keys.
Query Parameters
Mailbox public ID to target when the credential grants access to more than one mailbox. Omit when the credential is scoped to exactly one mailbox.
Body
1 - 100 elementsMap of message keyword names to booleans. true sets the keyword; false clears it. Keyword names are normalised to lowercase. Lifecycle keywords such as $draft are read-only.
{
"$answered": true,
"agent_triaged": true,
"needs_reply": false
}Optional message state token for stale-write protection.