## exceptions.TransportError


The link to the service failed at connect, in TLS, by disconnect or by timeout.


Usage

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


It is the only error that closes the connection. A `504` is a [ProviderError](exceptions.ProviderError.md#epistole.exceptions.ProviderError), because the service returned it. See ADR-0004.