> ## Documentation Index
> Fetch the complete documentation index at: https://api.docs.dealmachine.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Set Default Return Address

> Set a return address as default

Set a return address as the default for your organization. The previous default is unset.

<ParamField path="id" type="string" required>Return address ID</ParamField>

<RequestExample>
  ```bash cURL theme={null}
  curl -X POST https://api.v2.dealmachine.com/v1/mail/return-addresses/42/default \
    -H "Authorization: Bearer dm_sk_live_xxx"
  ```
</RequestExample>