Hmmm. I do just under 3 million at a pop on a couple medium size NT servers. I don't think I'd worry about 15,000 being problematic. Keith Stone EDS, Inc. -----Original Message----- From: LISTSERV give-and-take forum [mailto:[log in to unmask]]On Behalf Of Jane K Gehan Sent: Thursday, March 27, 2003 2:57 PM To: [log in to unmask] Subject: Very large list 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