| Date | IP Address |
| 2024-10-06 | 44.224.0.234 (ClassC) |
| 2025-07-13 | 35.164.28.101 (ClassC) |
| 2025-09-02 | 52.32.15.126 (ClassC) |
| 2025-11-09 | 44.242.9.45 (ClassC) |
| 2025-12-10 | 54.201.36.100 (ClassC) |
| 2026-01-06 | 52.33.45.88 (ClassC) |
| Date | Domain | IP |
| it-notif1.postofficeweb.com | 2025-05-16 | 35.167.237.67 |
| it-notif2.postofficeweb.com | 2025-05-17 | 44.226.124.2 |
| ssl.postofficeweb.com | 2025-05-13 | 44.226.124.2 |
| acir.postofficeweb.com | 2023-08-04 | 54.212.125.192 |
| rnicrosoft.postofficeweb.com | 2025-05-10 | 52.40.20.182 |
| www.postofficeweb.com | 2023-08-09 | 52.36.111.89 |
| delivery.postofficeweb.com | 2025-07-13 | 35.164.28.101 |