I need to configure my firewall to allow email communication from SAS Viya 3.5 to an external SMTP server. To achieve this, I must specify a source IP address. However, since I'm working with a Full Deployment of SAS Viya 3.5 that includes a Distributed CAS Server, I'm uncertain which specific service or node is responsible for sending emails when using the FILENAME EMAIL statement in a SAS script. Is it the Compute server, CAS Controller, CAs Workers or other?
TL;DR: In a Full Deployment of SAS Viya 3.5, which service, node, or element is effectively responsible for sending emails when using the FILENAME EMAIL statement?