Some organizations’ email systems filter out external messages unless they are on an allowlist. To ensure you and your team receive important course invitations, training updates, and notifications, please ask your IT team to safelist our organization.
Domains
Add the following domain to your email system’s allowlist:
constructivedialogue.org
Email Sources
We use two primary systems for sending emails:
HubSpot – Sends registration confirmations, training reminders, and newsletters.
Thought Industries – Sends course invitations and notification emails from our Perspectives learning platform.
Technical Details
Many organizations make acceptance decisions based on public blocklists, allowlists, and other standard configurations rather than maintaining their own lists. Our emails support DKIM and SPF, and partial support for DMARC (with quarantining to be added soon).
IP Addresses
If your system requires IP addresses to be safelisted, please provide your IT team with the following:
| CDI’s HubSpot IP Addresses | CDI’s Thought Industries Host Addresses |
| 141.193.184.64/26 | mail.thoughtindustries.com |
| 141.193.185.128/25 | ti._domainkey.thoughtindustries.com |
| 18.208.124.128/25 | ti2._domainkey.thoughtindustries.com |
| 141.193.184.128/25 | |
| 141.193.185.64/26 | |
| 158.247.16.0/20 | |
| 3.93.157.0/24 | |
| 108.179.144.0/20 | |
| 54.174.63.0/24 | |
| 3.210.190.0/24 | |
| 141.193.184.32/27 | |
| 54.174.52.0/24 | |
| 139.180.17.0/24 | |
| 141.193.185.32/27 | |
| 54.174.57.0/24 |