To define the descriptions of the return codes in "CodeActivite", consider “M" as the current month.
| Return code in «CodeActivite» | Corresponding label |
| 100 | The email was delivered once |
| 200 | The email is valid |
| 201 | Email was active last month |
| 202 | Between (M-1) and (M-2), email was active |
| 203 | Between (M-2) and (M-3), email was active |
| 204 | Between (M-3) and (M-4), email was active |
| 206 | Between (M-4) and (M-6), email was active |
| 209 | Between (M-6) and (M-9), email was active |
| 212 | Between (M-9) and (M-12), email was active |
| 300 | Inactive email |