Nope, you're not alone - I get the same bounces with each post, and am looking forward to the one that this generates... ;)
After slightly more investigation, it turns out that recursor.net belongs to spamgourmet.com which provides disposable email routing. Apparently someone signed up to the mailing list with a disposable email address which stops routing to an actual person after a given amount of time. My guess is that no amount of bitching to whomever "Warren" is will reach him, as the provided email address will not longer find a person, but continue to bounce to a list.
Apparently "unsubscribe" is difficult for some people.....
Removing this address from the mailing list is most likely going to be the only solution.