Sean
Which is in effect what you are trying to do.
Sorry but no, GMail does not search headers, and therefore cannot
filter on them. The one exception seems to be the recent addition of
a filter like this:
listid:"< Gmail-Users.googlegroups.com>"
Which is in effect what you are trying to do.
Works with those but I am also subscribed to groups that use ezelm
mailing list software and it doesn't have that header. Got around it
another way
Sean
Ezelm mailing list software doesn't use it. Think some older majordomo
software also doesn't
Sean
Ezelm is fairly obscure. I can't find many references to it on the
net (in English at least), and most of them I see refer to posts where
it has problems with simple things like attachments and
case-insensitiveness (which is actually a requirement of the RFCs that
define mailing list headers). I'd suggest the list-owner upgrade to
software developed after 1990. There are plenty of free alternatives
out there.
Sadly the option of upgrading the software is not mine. A lot of Linux
groups use ezelm software for some reason. Oh well off to play I go :)
Sean