There are few, if any, legitimate reasons to accept a list subscription
request without sending a subscription confirmation request, in order
to verify that the address is reachable, the address is the sender's
delivery address, and the request was not forged.

I believe that L-Soft should make necessary changes to the LISTSERV
product to make 'Subscription= Open' and 'Subscription= Open,Confirm'
functionally equivalent, i.e., either form of the statement will be
accepted, for backwards compatibility with existing lists, however,
LISTSERV will always send a subscription confirmation request, even
if the 'confirm' parameter is not present.

If it is felt that there may be legitimate reasons to accept a list
subscription without sending a subscription confirmation request,
then support for a 'noconfirm' parameter should be added to the
'Subscription=' keyword, however, its use should be restricted to
the site administrator, just as the use of the 'Sub-Lists=' keyword
is currently restricted.

--
Paul Russell
Senior Systems Administrator
University of Notre Dame