| Date | Domain | IP |
| mail2.systemblue.com | 2025-07-30 | 31.7.1.21 |
| relay2.systemblue.com | 2025-05-24 | 31.7.1.21 |
| vmail.systemblue.com | 2025-06-30 | 31.7.1.21 |
| styletto.systemblue.com | 2025-07-22 | 31.7.1.21 |
| root.systemblue.com | 2024-04-30 | 31.7.1.21 |
| mbox.systemblue.com | 2025-02-10 | 31.7.1.21 |