Nevermind, figured out my own problem. Just in case anyone else runs into this, here's what went down.
One of my users set up a filter to forward any email with OOS (out of stock) in the Subject to our company distribution list. So when she receives an email about her pet moose it gets forwarded to everyone, including back to her which creates the loop that error messages described. Moral of the story, use your filters wisely (and don't forward to lists that include yourself)
