service_unavailable

Returned as application/problem+json with code service_unavailable and HTTP status 503.

The service is temporarily unable to handle the request.

Common causes

• Maintenance or overload.
• An upstream circuit breaker is open.

How to resolve

• Retry after a short delay with backoff.

Example

1
{
2
  "type": "https://docs.usglobalmail.com/api/problems/service_unavailable",
3
  "title": "The service is temporarily unavailable.",
4
  "status": 503,
5
  "code": "service_unavailable",
6
  "request_id": "req_8f3c2a1b9d",
7
  "instance": "/v1/mails"
8
}