Re: http://incubator.apache.org/openofficeorg/mailing-lists.html
(Note: the "#" links on the main page are not finding the anchor, but only the page.)
What do you think of augmenting the mailto links with ?Subject="Subscribe" or even ?Subject=Subscribe&Body="Subscribe" (or Unsubscribe, as the case may be)? I think that really blank emails may be getting caught in spam filter traps.
Syntax reference: http://tools.ietf.org/html/rfc2368 -- /tj/