Quite honestly this: ----- The following addresses have delivery notifications ----- |/usr/local/bin/lsv_amin /home/spool/listserv owner-listserv" (unrecoverable error) (expanded from: owner-listserv) would indicate that you have an error in your /etc/aliases file under the 'owner-listserv' alias. Looks like an unmatched double-quote to me, which is exactly what sendmail is telling you: --- The transcript of the session follows --- 653 |/usr/local/bin/lsv_amin /home/spool/listserv owner-listserv"... There is a missing '"' character sh: /usr/local/bin/lsv_amin/home/spool/listserv.owner-listserv: not found 554 |/usr/local/bin/lsv_amin /home/spool/listserv owner-listserv"... Unknown mailer error 126 The alias <should> look like this in /etc/aliases: owner-listserv: "|/usr/local/bin/lsv_amin /home/spool/listserv owner-listserv" so it would appear that you have omitted the leading double-quote. I don't know if this is what is causing LISTSERV to choke but it certainly indicates an error that needs to be attended to before the owner-listserv address will work. Nathan