He is right. You cannot tell LISTSERV to ignore the case of the domain part of the RFC822 address, but it can certainly be told to upcase it unconditionally when it receives it. I plan to do it in the next version (there would be a conversion program to update the addresses in the LIST files). I know perfectly well that some <operating system name deleted> machines do NOT support uppercase domain-parts, which is a (another) violation of RFC822, but if it create REAL problems for DECENT mailing software, as this seems to be the case in Denmark, the decision is easy to make. Eric