On Wed, 28 Nov 2012 22:27:29 +0000, Matthew Black <[log in to unmask]>
wrote:

>The only people who MUST have access are LISTSERV site admins and list owners/moderators.

Not necessarily.  If a list has 'private' (limited to subscribers) message
archives then a login (userID+password) is needed to read those messages.  If
a list how no archives at all, or public archives then this is not a problem.

>What I'm trying to figure out is whether loss of the web GUI for subscribers creates much impact/harm. 

Not much I suspect.  Most users aren't even aware of the possibility of
changing their subscriber options, other than sub/unsub.

>If users want to unsubscribe from a list, can they simply click an HTML link in a message header/footer or will they need a password?

No.  But depending on list and/or server configuration LISTSERV may need to
send them an OK/confirmation request email to which they can click a link or
reply to the email in order to confirm the unsubscribe request.

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