I belong to many business groups, network marketing, direct sales, home based business, opt-in groups. We agree to send and received each others email 24/7 . Tohow many groups can I include in the "to". opr "cc" line without being called and autoresponder and shut down?

alexanderlegrand@yahoo.com

I don’t think yahoo reveals everything in order to keep spammers from doing the same thing, e-mailing mulitple addresses. my guess is 10 is a safe number