[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2022-09-30 UTC."],[[["This webpage describes the `InvalidHeaderNameError`, an error related to email headers."],["The error indicates that a provided header name is not valid within the context of the email."],["`InvalidHeaderNameError` inherits from the `Error` class and the `expected_type` class."],["`google.appengine.api.mail_errors.InvalidHeaderNameError` is the main alias for this error."]]],[]]