feed.rss is a snapshot of

  https://tails.boum.org/news/emails.en.rss

as of 2020-12-28.

HTTP headers:

    HTTP/2 200 
    server: nginx/1.10.3
    date: Mon, 28 Dec 2020 10:23:11 GMT
    content-type: application/rss+xml
    content-length: 60681
    last-modified: Sat, 26 Dec 2020 14:21:34 GMT
    vary: Accept-Encoding
    etag: "5fe746ee-ed09"
    strict-transport-security: max-age=15768000; includeSubDomains; preload
    x-frame-options: sameorigin
    x-xss-protection: 1; mode=block
    x-content-type-options: nosniff
    accept-ranges: bytes
