If you send an email to a group of people internal to your organization (e.g. current students, administration, faculty, staff), it's possible that your communication will not be accepted by your email firewall.
In order to get your messages into the inboxes of these contacts, we recommend working with your IT team to add the IP ranges listed below to a safe sender list.
| CIDR | Start of range | End of range |
| 173.236.20.0/24 | 173.236.20.2 | 173.236.20.254 |
| 192.92.97.0/24 | 192.92.97.2 | 192.92.97.254 |
| 52.128.40.0/21 | 52.128.40.0 | 52.128.47.255 |
| 217.8.118.0/24 | 217.8.118.0 | 217.8.118.255 |
You can also provide these IP ranges to external constituents such as Alumni board members or other leaders and volunteers. Have them ask their company or organization to add these IP ranges to their safe sender list as well.