{
  "auth": {
    "bearer": [
      {
        "key": "token",
        "type": "string",
        "value": "{{sendmux_api_key}}"
      }
    ],
    "type": "bearer"
  },
  "event": [],
  "info": {
    "description": {
      "content": "Send emails programmatically via the Sendmux email infrastructure. Every response carries an `X-Request-Id` header; errors include a `retryable` flag. 429 and 503 responses include `Retry-After`. Mutating endpoints accept an `Idempotency-Key` header for safe retries.",
      "type": "text/plain"
    },
    "name": "Sendmux Sending API",
    "schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json"
  },
  "item": [
    {
      "description": {
        "content": "",
        "type": "text/plain"
      },
      "event": [],
      "item": [
        {
          "event": [],
          "name": "Create an attachment upload URL",
          "protocolProfileBehavior": {
            "disableBodyPruning": true
          },
          "request": {
            "body": {
              "mode": "raw",
              "options": {
                "raw": {
                  "language": "json"
                }
              },
              "raw": "{\n  \"content_type\": \"<string>\",\n  \"filename\": \"<string>\",\n  \"sha256\": \"<string>\",\n  \"size_bytes\": \"<integer>\"\n}"
            },
            "description": {
              "content": "Create a short-lived upload URL and token that lets a remote client PUT one binary attachment without exposing the API key on the upload request. Requires `email.send` permission.",
              "type": "text/plain"
            },
            "header": [
              {
                "description": "Optional client-generated key to make the request idempotent for 24 hours. Replays under the same key return the cached response; a reused key with a different body returns 409 idempotency_conflict.",
                "disabled": true,
                "key": "Idempotency-Key",
                "value": "<string>"
              },
              {
                "key": "Content-Type",
                "value": "application/json"
              },
              {
                "key": "Accept",
                "value": "application/json"
              }
            ],
            "method": "POST",
            "name": "Create an attachment upload URL",
            "url": {
              "host": [
                "{{sending_base_url}}"
              ],
              "path": [
                "emails",
                "attachment-uploads"
              ],
              "query": [],
              "variable": []
            }
          },
          "response": [
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 201,
              "cookie": [],
              "header": [
                {
                  "description": "Canonical URL for the temporary attachment upload intent.",
                  "disabled": true,
                  "key": "Location",
                  "value": "string"
                },
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment upload URL created",
              "status": "Created"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 400,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Malformed request",
              "status": "Bad Request"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 401,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Authentication required",
              "status": "Unauthorized"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 403,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Insufficient permissions",
              "status": "Forbidden"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 409,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Idempotency conflict",
              "status": "Conflict"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 413,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment exceeds the upload size cap",
              "status": "Request Entity Too Large"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 422,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment upload validation failed",
              "status": "Unprocessable Entity (WebDAV) (RFC 4918)"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 429,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Rate limit exceeded",
              "status": "Too Many Requests"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 503,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment upload service temporarily unavailable",
              "status": "Service Unavailable"
            }
          ]
        },
        {
          "event": [],
          "name": "Upload bytes to an attachment upload URL",
          "protocolProfileBehavior": {
            "disableBodyPruning": true
          },
          "request": {
            "body": {
              "mode": "raw",
              "raw": "<binary>"
            },
            "description": {
              "content": "Upload the exact binary bytes for a previously-created attachment upload URL. This operation uses the short-lived upload token header returned by POST /emails/attachment-uploads, not a Sendmux API key.",
              "type": "text/plain"
            },
            "header": [
              {
                "description": "(Required) Short-lived upload token returned by POST /emails/attachment-uploads.",
                "disabled": false,
                "key": "X-Sendmux-Upload-Token",
                "value": "<string>"
              },
              {
                "description": "(Required) Exact number of bytes in the binary request body.",
                "disabled": false,
                "key": "Content-Length",
                "value": "<long>"
              },
              {
                "key": "Content-Type",
                "value": "application/octet-stream"
              },
              {
                "key": "Accept",
                "value": "application/json"
              }
            ],
            "method": "PUT",
            "name": "Upload bytes to an attachment upload URL",
            "url": {
              "host": [
                "{{sending_base_url}}"
              ],
              "path": [
                "emails",
                "attachment-uploads",
                ":upload_id"
              ],
              "query": [],
              "variable": [
                {
                  "description": "(Required) Upload intent ID returned by POST /emails/attachment-uploads.",
                  "disabled": false,
                  "key": "upload_id",
                  "type": "any",
                  "value": "<string>"
                }
              ]
            }
          },
          "response": [
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 201,
              "cookie": [],
              "header": [
                {
                  "description": "Canonical URL for the temporary uploaded attachment metadata.",
                  "disabled": true,
                  "key": "Location",
                  "value": "string"
                },
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment uploaded successfully",
              "status": "Created"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 400,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Missing or invalid upload headers",
              "status": "Bad Request"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 401,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Upload token missing, invalid, or expired",
              "status": "Unauthorized"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 404,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Upload intent not found or expired",
              "status": "Not Found"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 409,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Upload already completed with different content",
              "status": "Conflict"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 413,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Uploaded bytes do not match the expected size",
              "status": "Request Entity Too Large"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 422,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment validation failed",
              "status": "Unprocessable Entity (WebDAV) (RFC 4918)"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 503,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment storage temporarily unavailable",
              "status": "Service Unavailable"
            }
          ]
        },
        {
          "event": [],
          "name": "Upload an attachment",
          "protocolProfileBehavior": {
            "disableBodyPruning": true
          },
          "request": {
            "body": {
              "mode": "raw",
              "raw": "<binary>"
            },
            "description": {
              "content": "Upload binary attachment bytes and receive a temporary attachment_id for use in attachments[]. Requires `email.send` permission.",
              "type": "text/plain"
            },
            "header": [
              {
                "description": "Optional client-generated key to make the request idempotent for 24 hours. Replays under the same key return the cached response; a reused key with a different body returns 409 idempotency_conflict.",
                "disabled": true,
                "key": "Idempotency-Key",
                "value": "<string>"
              },
              {
                "description": "(Required) Exact number of bytes in the binary request body.",
                "disabled": false,
                "key": "Content-Length",
                "value": "<long>"
              },
              {
                "key": "Content-Type",
                "value": "application/octet-stream"
              },
              {
                "key": "Accept",
                "value": "application/json"
              }
            ],
            "method": "POST",
            "name": "Upload an attachment",
            "url": {
              "host": [
                "{{sending_base_url}}"
              ],
              "path": [
                "emails",
                "attachments"
              ],
              "query": [
                {
                  "description": "(Required) Filename to associate with the uploaded attachment.",
                  "disabled": false,
                  "key": "filename",
                  "value": "<string>"
                },
                {
                  "description": "MIME type override for the uploaded attachment.",
                  "disabled": true,
                  "key": "content_type",
                  "value": "<string>"
                }
              ],
              "variable": []
            }
          },
          "response": [
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 201,
              "cookie": [],
              "header": [
                {
                  "description": "Canonical URL for the temporary uploaded attachment metadata.",
                  "disabled": true,
                  "key": "Location",
                  "value": "string"
                },
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment uploaded successfully",
              "status": "Created"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 400,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Missing or invalid upload metadata",
              "status": "Bad Request"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 401,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Authentication required",
              "status": "Unauthorized"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 403,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Insufficient permissions",
              "status": "Forbidden"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 409,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Idempotency conflict",
              "status": "Conflict"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 413,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment exceeds the upload size cap",
              "status": "Request Entity Too Large"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 422,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment validation failed",
              "status": "Unprocessable Entity (WebDAV) (RFC 4918)"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 429,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Rate limit exceeded",
              "status": "Too Many Requests"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 503,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment storage temporarily unavailable",
              "status": "Service Unavailable"
            }
          ]
        },
        {
          "event": [],
          "name": "Get attachment metadata",
          "protocolProfileBehavior": {
            "disableBodyPruning": true
          },
          "request": {
            "description": {
              "content": "Return metadata for a temporary uploaded attachment owned by the authenticated team. File bytes are not returned.",
              "type": "text/plain"
            },
            "header": [
              {
                "key": "Accept",
                "value": "application/json"
              }
            ],
            "method": "GET",
            "name": "Get attachment metadata",
            "url": {
              "host": [
                "{{sending_base_url}}"
              ],
              "path": [
                "emails",
                "attachments",
                ":attachment_id"
              ],
              "query": [],
              "variable": [
                {
                  "description": "(Required) Temporary attachment ID returned by an upload endpoint.",
                  "disabled": false,
                  "key": "attachment_id",
                  "type": "any",
                  "value": "<string>"
                }
              ]
            }
          },
          "response": [
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 200,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment metadata",
              "status": "OK"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 401,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Authentication required",
              "status": "Unauthorized"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 403,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Insufficient permissions",
              "status": "Forbidden"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 404,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment not found or expired",
              "status": "Not Found"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 429,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Rate limit exceeded",
              "status": "Too Many Requests"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 503,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Attachment storage temporarily unavailable",
              "status": "Service Unavailable"
            }
          ]
        }
      ],
      "name": "Attachments"
    },
    {
      "description": {
        "content": "",
        "type": "text/plain"
      },
      "event": [],
      "item": [
        {
          "event": [],
          "name": "Send a single email",
          "protocolProfileBehavior": {
            "disableBodyPruning": true
          },
          "request": {
            "body": {
              "mode": "raw",
              "options": {
                "raw": {
                  "language": "json"
                }
              },
              "raw": "{\n  \"attachments\": [\n    {\n      \"content\": \"<string>\",\n      \"encoding\": \"base64\",\n      \"filename\": \"<string>\",\n      \"type\": \"<string>\"\n    }\n  ],\n  \"bcc\": [\n    {\n      \"email\": \"<email>\",\n      \"name\": \"<string>\"\n    }\n  ],\n  \"cc\": [\n    {\n      \"email\": \"<email>\",\n      \"name\": \"<string>\"\n    }\n  ],\n  \"custom_headers\": {\n    \"key_0\": \"<string>\"\n  },\n  \"from\": {\n    \"email\": \"<email>\",\n    \"name\": \"<string>\"\n  },\n  \"html_body\": \"<string>\",\n  \"reply_to\": {\n    \"email\": \"<email>\",\n    \"name\": \"<string>\"\n  },\n  \"return_path\": \"<email>\",\n  \"subject\": \"<string>\",\n  \"text_body\": \"<string>\",\n  \"to\": {\n    \"email\": \"<email>\",\n    \"name\": \"<string>\"\n  }\n}"
            },
            "description": {
              "content": "Queue a single email for delivery. Requires `email.send` permission.",
              "type": "text/plain"
            },
            "header": [
              {
                "description": "Optional client-generated key to make the request idempotent for 24 hours. Replays under the same key return the cached response; a reused key with a different body returns 409 idempotency_conflict.",
                "disabled": true,
                "key": "Idempotency-Key",
                "value": "<string>"
              },
              {
                "key": "Content-Type",
                "value": "application/json"
              },
              {
                "key": "Accept",
                "value": "application/json"
              }
            ],
            "method": "POST",
            "name": "Send a single email",
            "url": {
              "host": [
                "{{sending_base_url}}"
              ],
              "path": [
                "emails",
                "send"
              ],
              "query": [],
              "variable": []
            }
          },
          "response": [
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 200,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Email queued successfully",
              "status": "OK"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 400,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Malformed request (invalid JSON or syntactic parameter error)",
              "status": "Bad Request"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 401,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Authentication required",
              "status": "Unauthorized"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 402,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Insufficient credits",
              "status": "Payment Required"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 403,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Insufficient permissions",
              "status": "Forbidden"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 409,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Idempotency conflict (Idempotency-Key reused with different body, or request already in flight)",
              "status": "Conflict"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 413,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Request body exceeds 25 MB",
              "status": "Request Entity Too Large"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 422,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Validation error (schema failures, accumulated in error.errors[])",
              "status": "Unprocessable Entity (WebDAV) (RFC 4918)"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 429,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Rate limit exceeded (Retry-After header included)",
              "status": "Too Many Requests"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 503,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Service unavailable (Retry-After header included)",
              "status": "Service Unavailable"
            }
          ]
        },
        {
          "event": [],
          "name": "Send a batch of emails",
          "protocolProfileBehavior": {
            "disableBodyPruning": true
          },
          "request": {
            "body": {
              "mode": "raw",
              "options": {
                "raw": {
                  "language": "json"
                }
              },
              "raw": "{\n  \"messages\": [\n    {\n      \"attachments\": [\n        {\n          \"content\": \"<string>\",\n          \"encoding\": \"base64\",\n          \"filename\": \"<string>\",\n          \"type\": \"<string>\"\n        }\n      ],\n      \"bcc\": [\n        {\n          \"email\": \"<email>\",\n          \"name\": \"<string>\"\n        }\n      ],\n      \"cc\": [\n        {\n          \"email\": \"<email>\",\n          \"name\": \"<string>\"\n        }\n      ],\n      \"custom_headers\": {\n        \"key_0\": \"<string>\"\n      },\n      \"from\": {\n        \"email\": \"<email>\",\n        \"name\": \"<string>\"\n      },\n      \"html_body\": \"<string>\",\n      \"reply_to\": {\n        \"email\": \"<email>\",\n        \"name\": \"<string>\"\n      },\n      \"return_path\": \"<email>\",\n      \"subject\": \"<string>\",\n      \"text_body\": \"<string>\",\n      \"to\": {\n        \"email\": \"<email>\",\n        \"name\": \"<string>\"\n      }\n    }\n  ]\n}"
            },
            "description": {
              "content": "Queue up to 100 emails for delivery in a single request. Uses partial success model — individual message failures do not fail the entire batch. Requires `email.send` permission.",
              "type": "text/plain"
            },
            "header": [
              {
                "description": "Optional client-generated key to make the request idempotent for 24 hours. Replays under the same key return the cached response; a reused key with a different body returns 409 idempotency_conflict.",
                "disabled": true,
                "key": "Idempotency-Key",
                "value": "<string>"
              },
              {
                "key": "Content-Type",
                "value": "application/json"
              },
              {
                "key": "Accept",
                "value": "application/json"
              }
            ],
            "method": "POST",
            "name": "Send a batch of emails",
            "url": {
              "host": [
                "{{sending_base_url}}"
              ],
              "path": [
                "emails",
                "send",
                "batch"
              ],
              "query": [],
              "variable": []
            }
          },
          "response": [
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 200,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Batch processed (check individual results for per-message status)",
              "status": "OK"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 400,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Malformed request (invalid JSON or syntactic parameter error)",
              "status": "Bad Request"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 401,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Authentication required",
              "status": "Unauthorized"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 402,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Insufficient credits for entire batch",
              "status": "Payment Required"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 403,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Insufficient permissions",
              "status": "Forbidden"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 409,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Idempotency conflict",
              "status": "Conflict"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 413,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Request body exceeds 25 MB",
              "status": "Request Entity Too Large"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 422,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "All messages failed validation",
              "status": "Unprocessable Entity (WebDAV) (RFC 4918)"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 429,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Rate limit exceeded",
              "status": "Too Many Requests"
            },
            {
              "_postman_previewlanguage": "json",
              "body": "",
              "code": 503,
              "cookie": [],
              "header": [
                {
                  "key": "Content-Type",
                  "value": "application/json"
                }
              ],
              "name": "Service unavailable or all messages failed with transient errors",
              "status": "Service Unavailable"
            }
          ]
        }
      ],
      "name": "Emails"
    }
  ],
  "variable": [
    {
      "key": "sendmux_api_key",
      "type": "string",
      "value": ""
    },
    {
      "key": "sending_base_url",
      "type": "string",
      "value": "https://smtp.sendmux.ai/api/v1"
    }
  ]
}