(I've searched the IBMTCP-L as well as LSTOWN-L archives ...) Currently I operate an MVS TCP host that has DNS "A" record names in the form "a.b.PSU.EDU", "b.PSU.EDU", and "c.PSU.EDU". The "a.b" is the value in the TCPIP.DATA's HostName keyword. Likewise our MUA builds the BSMTP HELO with the "a.b.PSU.EDU". Our Bitearn Node entry for the Bitnet host specifies an :INTERNET tag with ALL of the above "A" names. I've verified that Revised Listserv can distribute mail (and Telnet) to the "c.PSU.EDU" host (I'm the list owner so I could add whatever hostname) and that Listserv equivalencing is correct between the Bitnet node and Internet HostName. Now what kind of "trouble" do you think I'll get into if I change the TCPIP.DATA HostName to the "c" value and the MUA BSMTP HELO to "c.PSU.EDU"? (I'm not ready to remove the DNS "A" records for the other values.) Real Life Experiences (RLE) appreciated. /Pete ([log in to unmask]) -- Peter M. Weiss | not affiliated with psuvm.psu.edu|psuvm 31 Shields Bldg -- Penn State Univ.| "Connectivity is more than a Connection" University Park, PA USA 16802-1202 | E. Michael Staman, _The Circuit_, Apr 92