Randy, Thank you for your input. But I don't like the extra job of approving postings from non-subscribers -- which in most cases is mail from subscribers using an alternate address, so they are actually subscribers after all -- I tried that for a couple of weeks, but it meant sitting and approving messages all day. In an average of between 250 and 350 messages per day a lot were from non-listed addresses. And I want less job, not more :-) Is it really such a stupid idea if Listserv had a default function where only existing top level domains were allowed to post to lists. When it's possible to ban attachments, why not nonexisting top domains? I wish someone would explain. Helge. [log in to unmask], Tolk- och översättarinstitutet / Institute for Interpretation and Translation studies, Stockholms universitet, S-106 91 Stockholm. Tel. +468162000. Fax +468161396. Home phone & fax +46854067243. <http://lisa.tolk.su.se/defhelge.html>