Look for Update and Trainings e-mails in your Junk/Spam folder.
The NEOC mailer has moved to a new hosting service, so you might need to re-train your spam filter.
Mark the NEOC e-mail as "not spam" and all should be well. (Gmail, Yahoo, AOL, Bing, etc. all have slightly different ways of doing this. Search for a Help article.)
If that doesn't help, please contact the Webmaster.