On Sun, Apr 26, 2015 at 2:37 PM, yar <yardenack(a)gmail.com> wrote:
  Gmail seems to be rate-limiting our IP because we keep
reflecting
 info(a)sudoroom.org spam. Incredibly, our postfix config lacked even
 basic spam protections. I've added a bunch of
 smtpd_recipient_restrictions which will hopefully help until we
 finally migrate to digitalocean. 
I think I fixed the spam problem but we are still getting lots of
deferred deliveries because of this. It may be an issue for a while,
possibly even until we migrate the server.