Since you destroyed Yahoogroup (December 16th) how can we moderate messages sent to group ?
Since a few days, it seems this is no more possible to moderate message sent to yahoogroups, So you do not know if the messages are sent or not.
over e-mail. If there's a message waiting for approval, the moderators get an e-mail about it. If the message is sent, the moderatiors will receive it (unless they put themselves on "nomail")