Ken:
The Branded Bounceback Address Configuration Workbook specifies the IP addresses you should whitelist. I'm not sure that link will work for everyone -- you might have to be an Oracle Partner to get to it -- so I've pasted the details below. I don't think Eloqua will mind.
Whitelist IP Ranges and Domains | |
View Eloqua-hosted landing pages and images in emails | POD1 - 209.167.231.15 POD2 - 209.167.231.23 POD3 - 142.0.160.10
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Receive emails from your Eloqua database |
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Later in the document, it also notes the following: "To ensure your marketers can access Eloqua hosted landing pages they create and receive emails from your Eloqua application, whitelist your subdomain as well as the Eloqua production IP range."
Andy