With the advent of the administrative web interface (as opposed to the browse-only web interface, which didn't need to issue LISTSERV commands), you're expected to take care of outgoing mail in a separate process. You can do this with the old ASYNCH_SMTP feature but I suggest using SMTP workers instead as this is more flexible. Just add something like: SMTP_FORWARD_1="2*my.smtp.server.com" export SMTP_FORWARD_1 This creates 2 extra processes whose job is to clean up the outgoing spool directory. LISTSERV is then free to process commands as they arrive. Try it, it is night and day. Eric