It sounds like someone on the list may have their account set up to avoid SPAM. The message is usually bounced back to the sender and to the administrator of the list. Since you are getting bounces from what sounds like other list members, I would think this is the case. It might also be RootsWeb doing the bouncing but that usually only happens when something is attached to the email or if your message contains something that might be construed as an advertisement. Even a signature file can be returned as a bounce because some of the new ones are "attached" to the message rather than embedded. The only way to know for sure is to look at all the headers in your bounce notice and I don't know if you can do that in your yahoo mail. (It's been a while since I used them.) Gina