| Date | IP Address |
| 2020-09-01 | 54.154.10.229 (ClassC) |
| 2022-07-13 | 54.77.206.21 (ClassC) |
| 2025-08-29 | 63.35.12.234 (ClassC) |
| 2025-10-06 | 63.33.241.30 (ClassC) |
| 2025-11-02 | 34.255.222.2 (ClassC) |
| Date | Domain | IP |
| m.mce.email.sanofi | 2025-10-06 | 63.33.241.30 |
| t.mce.email.sanofi | 2025-08-29 | 63.35.12.234 |