Integrating partners using the SMS API (formerly OptiText API) must add the following Optimove egress IP addresses to any firewall allowlist so that traffic coming from Optimove — including Campaign Transmission Webhook requests — is accepted.

ℹ️
Allowlist the addresses for the region your tenant is hosted in. If you are unsure which region applies, allowlist both sets.

EU IP Addresses

35.198.188.17
34.107.29.24
35.246.154.200
34.107.86.58

US IP Addresses

35.221.56.26
35.221.33.157
34.86.85.20
35.221.48.107

These addresses are most relevant when implementing the Campaign Transmission Webhook, which receives inbound requests from Optimove.