| Date | IP Address |
| 2022-11-03 | 54.71.214.40 (ClassC) |
| 2025-05-13 | 44.226.124.2 (ClassC) |
| 2025-05-17 | 35.167.237.67 (ClassC) |
| 2025-07-25 | 54.185.3.90 (ClassC) |
| 2025-08-31 | 52.35.168.1 (ClassC) |
| 2025-10-01 | 52.38.174.14 (ClassC) |
| 2025-11-03 | 34.213.21.114 (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 |