Archives are unable to show the contents of messages sent using PGP/MIME instead of inline PGP emails as can be seen in the URL example. Archives show instead the error "Cannot parse MIME/contents."
The bug is more nuanced than that I think. I send PGP/MIME as well, but my mails work: https://archives.gentoo.org/gentoo-project/message/9f0608babfba8b29b9454e563fd82316
@a3li: The archives MIME parser isn't considering that the first text/plain part might be at a greater depth than one, or the first part. Works: ( text-part signature-part ) Broken: ( ( text-part attachment-part ) signature-part )