I fear that it is impossible to totally aviod comflict between
optimizing the navigation and search ways of finding information,
here. Please take care that in optimizing the search you don't
render link-following useless.
A subtle feature was added awhile back as requested by Achim. A
message page has special comments inserted before and after the message
head and message body. I believe Achim is able to tell Glimpse to only
index data beetween these comments so navigational data will not
With whatever search engine you are using, you can do the same.
To see what the comment declarations are, just look at the raw HTML
of a converted message.