**Source URL:** https://general.veevavault.dev/vault-sdk/sdk-integrations/spark-messaging/message-delivery-allowlist.md

# Message Delivery Allowlist



Outbound Spark messages are sent from an IP address associated with Veeva Vault. To accept Spark message delivery, modify your network and firewall rules by allowlisting `*.veevavault.com`.

Vault does not support authentication with Vault API for Spark message delivery.



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