Alan Horkan wrote:
There are many other things you can also filter on other than the subject line (various mail headers, the footnote that is always included, etc).
I would encourage people to use more descriptive subject lines, think of it as a summary and if you can describe the gist of the whole message in just one line then please do.
Some tips about this also in <http://www.useit.com/alertbox/980906.html>