Archive URL in Email

I agree this would be extremely handy. I'd post the URL to a
thread about it on mailman-users, but I'm too lazy to find
it in the archive. Of course if there was a URL in the emails...

FWIW, Brad Knowles posted that right now this isn't possible
to do because the archives use a sequence number. If instead
they used a hash of the email, then doing this would be easy.

Some sort of unique identifier (a hash, or some other
permanent ID tag inserted as a header in the .mbox file) for
each message would be very useful if the archive is later
modified and rebuilt.

Currently if a message is removed or added and the archive
rebuilt, search engines must reindex the entire archive to
get the updated URL for each message based on the new
sequence numbers. For large archives this is non-trivial.

+1 for a unique and permanent URL per message, +0 for having
the message URL included in the message/headers.

DO you mean a header like X-List-*

A header would certainly suffice. If you wanted to be really
slick I guess you could allow people to add it to the footer
sent with every email, though I'd never use that.

This is already available in Mailman 3. See http://wiki.list.org/display/DEV/Stable+URLs