I took a closer look. Attachments are never indexed because of
echo "exclude_urls: .dir" >> $CFG so I now feel safe doing your original - echo "limit_urls_to: $TARGET/$MAILLIST/" >> $CFG + echo "limit_urls_to: $TARGET/$MAILLIST/msg" >> $CFG and I've now done so. By the way, index pages are already protected from htdig in exactly the correct fashion (don't index the page, but do follow the links) by the META tag at the top of the page. Jeff