I haven't seen them, but that may mean they're getting trapped by my spam filter.
Over the past couple weeks I’ve received a couple emails from email@example.com, hawking herbal supplements or some such thing. I assume this list would have no part in spamming me, but I’m wondering: does this happen to anyone else or is something cloning addresses out of my inbox?
It's very easy to spoof email addresses. VERY easy.