Mail Protection Gateway (MPG) Success Continues

Since its implementation in May 2017, the Mail Protection Gateway (MPG) has blocked and filtered 90% of all incoming Caltech email, including:

  • 389,500,000 emails from questionable senders
  • 13,000,000 spam emails
  • 4,778 virus emails
  • 364,900 emails with malicious links

For more information about the Mail Protection Gateway, visit, or to check your quarantine, visit