> What you can do is create a restriction class to check the sender > and the recipient, and reject the message if both match. The > general procedure is outlined here, with some examples similar to > what you're asking: > http://www.postfix.org/RESTRICTION_CLASS_README.html > > Alternately, you can use a policy service such as postfwd to reject > mail with a combination of sender and recipient. > http://www.postfix.org/SMTPD_POLICY_README.html > http://postfwd.org/
O.K. Thanks. I'll read up on those. BTW, I do realize that silent discard is not really correct. But the problem is that Yahoo groups isn't behaving correctly. It has been configured to send no e-mail to the accounts in question. And it doesn't send regular group discussion e-mail. But it still sends announcement e-mails, such as when someone posts a file. Evidently, "no e-mail" isn't really "no e-mail". If I bounce the emails, there's the potential that the Yahoo system may delist the accounts because of bounces. So I plan to silently discard the mail that Yahoo shouldn't be sending in the first place. Thanks again, Michael
