As I noted, Out Of Office replies respond with the original Subject Line, which is not at odds with the data you've posted, but that doesn't make it spam.
It came from my corporate email, with my .sig. I received some basic information, but not enough to determine whether or not an auto-responder was involved initially. Further investigation on MCI's side indicates that all three header snippets were almost assuredly from Vacation messages. They did not provide the requested Body information (which would NOT have compromised SpamCop's Spamtraps, but would indicate whether or not it was an Autoreply or actual spam). I tested this function myself to confirm that the body was not being included in the Autoreply.
Read what I wrote again. The only way it could have happened is if said spam with a forged From: address hit a box set with an Out of Office autoreply. That is NOT a Bounce. And it is NOT UCE. Such Autoreplies are a required function of email for the Business World. If you are listing because of them, SpamCop needs to fix it's listing criteria. As this functionality cannot be used to spam anybody (Since the body isn't included in the Autoreply), and is required by MCI's clients for legitimate business reasons, MCI simply can't turn it off.
18.104.22.168 is not listed at http://psbl.surriel.com/. It's not listed anywhere except SpamCop at last check (Friday, 22 Sept).
MCI is quite willing to fix our server if it is indeed broken. But SpamCop has not provided evidence that indicates that anything beyond an Autoreply is involved here. If SpamCop provides me with the necessary information which indicates an actual problem, I will get the system fixed.
Internet Security Specialist
Thank you for this test. This has the information that I need, ca.mci.com is our local domain (and the domain the server lives in) and it appears that the server will relay (or bounce) for the local domains only. This could well be the issue that is causing the listings. This will be corrected. Once again, thank you, we had missed that possibility.