Set CORS headers on requests with method OPTIONS
XHR failed loading: OPTIONS "https://accounts.autistici.org/sso//?s=1.webmail.autistici.org%2f&d=https%3a%2f%2f1.webmail.autistici.org%2f%3f_task%3dmail%26_action%3drefresh&n=blah&g=users".
XHR failed loading: OPTIONS "https://accounts.autistici.org/sso//?s=1.webmail.autistici.org%2f&d=https%3a%2f%2f1.webmail.autistici.org%2f%3f_task%3dmail%26_action%3drefresh&n=blah&g=users".