Can Horcrux be used with Proton Mail? I've tried using Proton Bridge with Horcrux, in order to access the correct IMAP settings (Hostname, Port, Username, unique password), but Horcrux won't recognize those settings. Horcrux doesn't allow me to enter STARTTLS, only SSL, could that be the problem? In any case, no matter what I enter, I get a connection error.