| 405 | Method not allowed | This error code indicates that the request method is known by the server but has been disabled for this API call. Learn More | Method_error |
| 100 | api_key is not passed in the header | API key is not passed in the header | Validation_error |
| 101 | Invalid api_key passed | Invalid API key is passed in the API call | Validation_error |
| 102 | APIs from this IP address is not allowed | APIs from this IP address is not allowed | Validation_error |
| 110 | Blank content is passed in the payload | Blank content is passed in the payload | Common_error |
| 111 | Invalid JSON format passed in the API call | Invalid JSON format passed in the API call | Common_error |
| 113 | Parameter [KEY] not passed in the API call | Parameter [KEY] not passed in the API call | Common_error |
| 130 | Invalid domain name | Invalid domain name | Domain_error |
| 131 | Domain already added | The domain which you're trying to add was already added. | Domain_error |
| 140 | Invalid email address passed | Invalid email address passed. | Suppression_error |
| 141 | Invalid email domain passed | Invalid email domain passed. | Suppression_error |
| 150 | Invalid Tempalate ID passed | Invalid Tempalate ID passed | Template_error |
| 151 | Invalid Tempalate Name | Invalid Tempalate Name | Template_error |
| 152 | Template Content is passed as blank | Template Content is passed as blank | Template_error |
| 153 | Template size should be less than 10MB | Template size should be less than 10MB | Template_error |
| 160 | Start date and end date both should be in required format (yyyy-mm-dd) | Start date and end date both should be in required format (yyyy-mm-dd) | Credit_error |
| 161 | Start date should be less than end date | Start date should be less than end date | Credit_error |
| 112 | Invalid fromEmail used in API call. Hence authentication failed | Invalid fromEmail used in API call. Hence authentication failed | SendEmail_error |
| 114 | Empty recipient list, please make sure you mention at least one recipient | Empty recipient list, please make sure you mention at least one recipient | SendEmail_error |
| 115 | Your account has expired | Your account has expired | SendEmail_error |
| 116 | Subject not specified | Subject not specified | SendEmail_error |
| 117 | Content not specified | Content not specified | SendEmail_error |
| 118 | Invalid TemplateID | Invalid TemplateID | SendEmail_error |
| 119 | Invalid AttachmentID | Invalid AttachmentID | SendEmail_error |
| 120 | Personalization should be an Array object | Personalization should be an Array object | z |
