hyperkitty does not use a fixed-width font for e-mails

I noticed mails with ASCII tables look very messy in hyperkitty: https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/R6VRNIVSURTIOBJHYIDJD6ZHNJ5L7WX2/

This is because it is a ASCII art table and hyperkitty does not use a fixed-width font. Is there a way to get a link to these messages with a fixed-width font so people could properly read them? Would it be a possibility to always use a fixed-width font? Do you have a different solution to prepare e-mails with tables that are better to read?

Initially I filed this at Fedora Infrastructure: https://pagure.io/fedora-infrastructure/issue/6057