[Mailman-Developers] Improving the archives

[Stephen J. Turnbull]

Barry Warsaw writes:

 > Second, things can happen to a list  
 > that might cause this sequence number to get corrupted.

Add an X-Mailman-Sequence-Number header if not already present.

That doesn't deal with your other comments, but as I point out
elsewhere, if you don't use *any* Mailman-specific information in the
global ID, you have no sane way to handle collisions except throw them
away (or make the global ID refer to a collection resource, but that's
kinda unintuitive).