## exceptions.ThrottledError


The service throttled the request.


Usage

``` python
exceptions.ThrottledError(
    message,
    /,
    *,
    retry_after=None,
    backend=None,
)
```


Epistole never sleeps or retries. The SMTP backend never raises this error. See ADR-0004.


## Attributes


`retry_after: float | None`  
Seconds from the `Retry-After` header in either RFC 9110 form, or `None` when the response had none.