# Gmail API . users . history

## Instance Methods

Lists the history of all changes to the given mailbox. History results are returned in chronological order (increasing historyId).

Retrieves the next page of results.

### Method Details

`list(userId, pageToken=None, maxResults=None, startHistoryId=None, labelId=None)`

    Lists the history of all changes to the given mailbox. History results are returned in chronological order (increasing historyId).

    Args:
      userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
      pageToken: string, Page token to retrieve a specific page of results in the list.
      maxResults: integer, The maximum number of history records to return.
      startHistoryId: string, Required. Returns history records after the specified startHistoryId. The supplied startHistoryId should be obtained from the historyId of a message, thread, or previous list response. History IDs increase chronologically but are not contiguous with random gaps in between valid IDs. Supplying an invalid or out of date startHistoryId typically returns an HTTP 404 error code. A historyId is typically valid for at least a week, but in some circumstances may be valid for only a few hours. If you receive an HTTP 404 error response, your application should perform a full sync. If you receive no nextPageToken in the response, there are no updates to retrieve and you can store the returned historyId for a future request.
      labelId: string, Only return messages with a label matching the ID.

    Returns:
      An object of the form:

        {
        "nextPageToken": "A String", # Page token to retrieve the next page of results in the list.
        "historyId": "A String", # The ID of the mailbox's current history record.
        "history": [ # List of history records.
          { # A record of a change to the user's mailbox. Each history contains a list of the messages that were affected by this change.
            "messages": [ # The messages that changed in this history record.
              { # An email message.
                "historyId": "A String", # The ID of the last history record that modified this message.
                "payload": { # A single MIME message part. # The parsed email structure in the message parts.
                  "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
                    "data": "A String", # The body data of a MIME message part. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
                    "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
                    "size": 42, # Total number of bytes in the body of the message part.
                  },
                  "mimeType": "A String", # The MIME type of the message part.
                  "partId": "A String", # The immutable ID of the message part.
                  "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
                  "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
                    {
                      "name": "A String", # The name of the header before the : separator. For example, To.
                      "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
                    },
                  ],
                  "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
                    # Object with schema name: MessagePart
                  ],
                },
                "snippet": "A String", # A short part of the message text.
                "raw": "A String", # The entire email message in an RFC 2822 formatted and URL-safe base64 encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
                "sizeEstimate": 42, # Estimated size in bytes of the message.
                "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
                    # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
                    # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
                    # - The Subject headers must match.
                "labelIds": [ # List of IDs of labels applied to this message.
                  "A String",
                ],
                "id": "A String", # The immutable ID of the message.
              },
            ],
            "id": "A String", # The mailbox sequence ID.
          },
        ],
      }

`list_next(previous_request, previous_response)`

    Retrieves the next page of results.

    Args:
      previous_request: The request for the previous page. (required)
      previous_response: The response from the request for the previous page. (required)

    Returns:
      A request object that you can call 'execute()' on to request the next
      page. Returns None if there are no more items in the collection.