Question: Sometimes I receive an email that has my own email address listed as the sender's.? Inevitably, it occurs when there are group emails. Is is a BCC or some kind of server based group?

Answer: It could be "spoofing."  Maybe someone wants people to think the emails are coming from you, but more likely they just don't want people to know they're the sender.  (And take the advice of the folks who answered before me.)
This question from the Yahoo Q&A forum is categorized in the topic: Sports