@robdaemon this was actually because of a dns error left behind because of a move to a different machine.
should be fixed now :)
@foura yeah, the problem with Outlook and ProtonMail is that their heuristics aren't available to view. Oh well, SDF will work fine for me.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko