## Postback IP addresses
| production | sandbox |
|  --- | --- |
| 18.195.228.88 | 35.159.56.107 |
| 3.68.255.126 | 18.153.214.226 |
| 3.127.95.240 | 18.194.246.210 |
| 18.198.146.231 | 52.28.150.254 |