Re: [ietf-822] one can re-sign without a permission to re-sign header

["John Levine" <[e-mail]>]

>That would provide some replay protection, especially if the forwarder 
>checks for duplicate message-ids (the recipient could also check for 
>dupes). Without it, I could see one of your messages on a list, then 
>send messages to everyone on the list, pretending to be you.

You could, but now we're back to whether we believe that list managers
act to keep crud out of their lists.  In general, I observe that they
do, so I don't see any point to adding features that assume that
managers will just sit there and allow subscribers to abuse their
lists.

Anecdote: I am on one non-technical list where there is an extremely
obnoxious person who chronically poisons the dialog, yet the list
managers are unwilling to eject.  (My guess is that he is a large
donor to the organization.)  I have dealt with him by bozo filtering
his mail in procmail, but other people keep writing to me and asking
isn't there list software that will let subscribers decide which other
subscribers' mail to get, i.e. do the bozo filtering in the list
software.  As far as I can tell, no, because this is not a problem
that many lists have.

R's,
John