no mail from list

Sorry for bothering the list, but mail to walt@rmy.emory.edu and a phone call to him have gone unanswered. I guess he is on vacation, cause he is usually very prompt. Our local maillist which distributes mail received from this list has had no incoming list mail since beginning of July. Our list works locally and I know my outgoing mail, like this, works. Any suggestions on how to remedy this? PS: Please email responses as, obviously, I can't read the list! Ann Barnes