| Date | IP Address |
| 2020-07-29 | 54.70.51.30 (ClassC) |
| 2022-04-20 | 44.240.98.240 (ClassC) |
| 2022-11-02 | 54.71.214.40 (ClassC) |
| 2025-01-16 | 54.200.48.241 (ClassC) |
| 2025-04-22 | 52.41.64.243 (ClassC) |
| 2025-05-10 | 52.40.20.182 (ClassC) |
| 2025-07-26 | 35.163.121.156 (ClassC) |
| 2025-09-08 | 52.39.222.201 (ClassC) |
| 2025-10-08 | 44.229.227.161 (ClassC) |
| 2025-11-25 | 54.201.36.100 (ClassC) |
| 2026-02-27 | 16.146.219.157 (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 |