I've just realized that maybe I should be asking "what is the nature of this potential problem?" that you're working to correct? My site has a grand total of around 12,000 subscribers on all lists, and I just looked at the signup files, they are all 47k-49k in size. I don't know what the "recommenced" size range is, or what might 'go wrong' if they grow too large. >>> [log in to unmask] 10/3/2005 6:26:57 PM >>> I timed a test of deleting 5000 (well, really 4900) records using REGISTER ... OFF, and found that Listserv does ~200 names per minute (on our site; ymmv). So deleting 275000 names will take about 23 hours. I can break this up into smaller chunks, but regardless the web interface is inaccessible/unusuable when one of these things is running. Click on the web interface, nothing happens for however long- wonderful customer service. I can do it several early mornings, but while that removes most of the impact from SU customers (although a university never really sleeps), it's not good for international customers. I can't even realistically announce outages, because we can't email 120k subscribers over 1900 lists (yes, we can let list owners know). And regardless of which way I go, it's a pain to manage in chunks. Probably I should have done this long ago, but I didn't even realize it was a (potential) problem. - Listserv List Manager Listserv webpage: http://listserv.syr.edu Web access to List Archives, Manuals, and List Management for Owners.