Hi, My company has been using listserv classic for the past several months with pretty good results. We send out a bi-monthly newsletter to over 50,000 subscribers. One major problem we're still having is that invalid e-mail addresses, addresses with permanent delivery failures are not beling deleted. I believe this problem has been fixed. The Auto-Delete setting: Auto-Delete= Yes,Full-Auto, Delay(9)), Max(2), Probe(30) Does this setting work? Should I change this setting?