On Thu, 30 Oct 2003 17:51:27 -0500 Barry Warsaw <barry@python.org> wrote:

On Wed, 2003-10-29 at 13:30, J C Lawrence wrote:

...

2. Message IDs are not guaranteed globally unique, but the collision rate can be manageable/acceptable in a large number of deployment cases.

Ah, which reminds me, elaborating on my strawman, the answers to "when should Mailman rewrite Message-ID on posts" should be: Never, Only to resolve duplicates, Always.

Does that mean that we keep a database of all Message-IDs that all lists on that host have ever seen? If so, what happens when a single message is CC'ed to multiple lists? NetNews servers require global uniqueness across all newsgroups.

I'm rapidly coming to the conclusion that we have to rewrite all Message-IDs whenever the internal archive is enabled.

-- J C Lawrence
---------(*) Satan, oscillate my metallic sonatas. claw@kanga.nu He lived as a devil, eh?
http://www.kanga.nu/~claw/ Evil is a name of a foeman, as I live.