The problem you wrote about is one that happens from time to time on email discussion groups, and unfortunately there is not a whole lot that can be done about it. Here's what happened: One of the people responding to the Time in economic theory conf. posting had an automatic code attached to their message that asked for receipt confirmation. Anyone on the list whose email reader is programmed to respond to requests for confirmation will now automatically send a RCPT: confirmation when they open that particular message. If you want to avoid the problem, do the following: ensure that your program does not ask for, or respond to, receipt confirmation requests. When RCPT: confirmations do appear on the list, simply delete the messages. There's not much else one can do, once the loop is initiated, except wait it out. Ross listowner - HES Ross B. Emmett, Augustana University College, Camrose, Alberta CANADA T4V 2R3 voice: (403) 679-1517 fax: (403) 679-1129 e-mail: [log in to unmask] or [log in to unmask]