Noscript warning

I belong to an historic radio club and I get there newsletter as an attachment to to an email. The most recent arrived today. On trying either to download or view Firefox's Noscript attachment gives a warning and on the browsers current page an error message something like "web page not availible" is displayed. I have never struck this behaviour on downloading an email attachment before. I know little about web page security but this I do regard as suspicious. Lindsay