Hi, Thanks for all the posts. The responses helped me clarify a few things that I did not quite understand before. The restrictions desired were requested by the faculty. Some of our undergraduate service classes have over 400 students in them. Although the lists that I'm creating are for smaller classes. BTW, that was my first post to the list. I was surprised to get the following response back yesterday, shortly after I sent the message. ------------------------------------------------------------------------ Date: Thu, 13 Feb 2003 19:47:16 -0500 From: Mailer-Daemon <Mailer-Daemon@massart.edu> To: larry@wald.ucdavis.edu Subject: NDN: Can one-way lists be created? [ The following text is in the "ISO-8859-1" character set. ] [ Your display is set for the "US-ASCII" character set. ] [ Some characters may be displayed incorrectly. ] Sorry. Your message could not be delivered to: paonia,Mass College Art (The name was not found at the remote site. Check that the name has been entered correctly.) ------------------------------------------------------------------------- Apparently, my submission got through to the list okay eventually. Can anyone shed some light on this, regarding the above mailer-daemon response. Thanks. -- US-Mail: Larry Tai Department of Statistics 368 Kerr Hall University of California, Davis One Shields Avenue Davis, CA 95616 E-Mail: larry@wald.ucdavis.edu or lptai@ucdavis.edu Tel: (530)-752-6085 FAX: (530)-752-7099