We may set up a large list - about 15,000 subscribers. It will be a newsletter type list. We would use the "Prime" option to restrict the hours during which it would be distributed. Is a mailing like this done in "chunks"? Will listserv process other mail during the time it is processing this mail? Any advice on how to manage the processing of a large list of this kind? Thanks. Jane K. Gehan Academic & Distributed Computing Services E-mail: [log in to unmask] Office of Information Technology Phone: (612) 626-1810 University of Minnesota Fax: (612) 626-7593