| Date | Domain | IP |
| event.a1e0.squarespace-mail.com | 2025-03-04 | 142.0.191.16 |
| engage.squarespace-mail.com | 2024-11-26 | 198.49.23.144 |
| a1e0.engage.squarespace-mail.com | 2024-05-31 | 198.49.23.145 |
| mgcp01.engage.squarespace-mail.com | 2024-11-05 | 198.185.159.145 |
| mgcp02.engage.squarespace-mail.com | 2024-10-08 | 198.49.23.144 |
| mgcp03.engage.squarespace-mail.com | 2024-11-06 | 198.185.159.145 |
| f69e.engage.squarespace-mail.com | 2024-05-25 | 198.185.159.144 |
| event.squarespace-mail.com | 2024-12-04 | 142.0.190.16 |