Michael, You need to have your DNS people remove the MX records that point mail bound for listserv.opm.gov to other servers. If they must have an MX, it should point to listserv.opm.gov in order that LISTSERV mail can go straight to the LISTSERV machine. If listserv.opm.gov is behind a firewall (as it appears it may be) then you need to have the people in charge of the firewall open port 25 access to the machine so that mail can get through. You would also have to have them open port 2306 for the LISTSERV TCPGUI interface used by the web features, if you have the web features enabled. The only alternative to the above is to ensure that the machines that are defined as MX hosts for listserv.opm.gov know what to do with mail addressed to recipients on listserv.opm.gov. It does not appear that this is currently the case. Note that there are two MX hosts and both of them would have to be able to do this. If you are running LSMTP you need to stop and disable the SMTPL.EXE "listener" service as it will otherwise conflict with LSMTP. (The LSMTP installation should technically have done this for you...) Nathan