OPIS Conference Safe Sender List

To prevent conference-related messages from going into the junk or spam folder of your email, please note and add the following email addresses, domains, and IP addresses to your safe sender list:

+-Sending Email Addresses
  • coal.events@opisnet.com
  • registrar@opisnet.com
+-Sending Domains
  • @opisnet.com
+-Sending IP Addresses
  • 23.23.239.161
  • 166.78.71.49