Ah, I see. So this is my whole link, should I change anything else? As you can see it's referencing an Eloqua form, etc:
http://now.eloqua.com/e/f2.aspx?elqFormName=thirdparty-unsubscribe&elqSiteId=741342956&e=<span class="eloquaemail">EmailAddress</span>&url=http://go.endicia.com/subscribe-pr
Can you point me to more documentation on the topic? Thank you.