Some update must've made it so that SMTP mail isn't reading my password from ~/.authinfo any more. It reads everything else OK (hostname, port), but prompts me for my password the first time I try to send mail after restarting emacs. So right now, every time I restart emacs, I have to open .authinfo, copy my password, and paste it into emacs. How can I get it to properly load my password from .authinfo?
In case it matters, here's my .spacemacs.