@stujr@bsd.cafe I have not used the librem.one email service at all, never even tried it. The only part of my librem.one account I am using is this, the Mastodon part (called Librem Social, social.librem.one).

So I don't really know, but I guess K9 Mail shouldhopefully work with the settings described at https://docs.puri.sm/Librem_One/Generic.html