a) The Apache list server has no virus scanner?
The Apache list server has a virus scanner. It just happend that there were apparently at least three and more than 7 new variants of Bagle, MyDoom and NetSky released yesterday within a few hours.
Also, the worms seem to be specifically designed to also get to subscriber-only lists. This may be a side effect of matching gathered sender and reciever addresses. Think of the worm finding saved mails or cached HTML pages of a web archive and deducing if there's a "To: [EMAIL PROTECTED]" and a "From [EMAIL PROTECTED]", then foo-list is more likely to open suspicious attachments if the sender were foo, which unfortunately also gets mail through to lists.
All lists with some volume I have subscribed to have been targetted by the worms. This is a novelty. While there had been worms forwarded to lists by clueless people in the past, this seems to be the first time a worm managed to get to the subscription barrier on its own.
J.Pietschmann