With Postmaster authority, submit a command like this to the LISTSERV(tm) site in question: change * [log in to unmask] [log in to unmask] I may have that slightly wrong, typing off the top of my head, but it's in the documentation. Wildcards are permitted too, so you could change *@old.isp.com *@new.isp.com as well, if need be. Or things like *@email.service.com to *@service.com work also. >>> [log in to unmask] 05/05/03 12:00PM >>> Hi all, Do you know how I can change user's mailing address for all the lists? Thanks in advance! Eric