I checked the @gajim issue tracker for PKIX over Secure HTTP (POSH) support and it looks like it was implemented already 5 years ago: https://dev.gajim.org/gajim/gajim/-/issues/9083
But I can't find the setting in the current #Gajim version and didn't managed to connect to my #xmpp server so far which uses "PKIX over Secure HTTP" for ssl verification.
#followerpower, any ideas?