I used the VMWare Converter to generate a guest machine from the original Windows Server 2003 system on a 700Mhz Pentium box. I'm running the result under VMWare Server on a W2k3 system with a 3.6Ghz Pentium processor. Other than the expected and documented transition issues from the conversion (in particular the Ethernet Adapter is changed so all IP settings have to be reset, but this is trivial - and actually about the worst issue in the deal - - supposing you already understand VMWare in general). The improved performance of the new setup is quite nice too, but the main motivation for this change was to get rid of the old equipment. In short, I believe VMWare and the virtualized environment are no cause for concern. A) It's really good stuff. B) Mailing lists management and SMTP handling just don't do anything "strange" that would provoke odd issues. >>> [log in to unmask] 3/20/2007 8:25:40 AM >>> I intend to upgrade from 14.5 to 15 on a SuSE Linux server in early May. Probably in June, I am looking to migrate LISTSERV to new hardware, which will actually be a Red Hat Linux instance on a VM Ware virtual machine which will also run Sendmail and Apache. I have LISTSERV lite 15 running on that virtual machine now, but its hardly been used. Your question reminds me to ask if anyone else is running LISTSERV on a similar virtualized environment. If so, how's it working out for you?