I am using the tutorial of pipeline jobs and trying to make "post" section with sending email
https://jenkins.io/doc/book/pipeline/jenkinsfile/ under Handling Failures

my os is rhel 7.2, using jenkins 2.32.2 and latest pipeline plugin

my problem is that this code does not working for me. i am getting error No such DSL method 'post' found among steps [archive, bat, build, catchError, checkout, deleteDir, dir, dockerFingerprintFrom, dockerFingerprintRun, echo, emailext, emailextrecipients, envVarsForTool, error, fileExists, getContext, git, input, isUnix, libraryResource, load, mail, milestone, node, parallel, properties, pwd, readFile, readTrusted, resolveScm, retry, script, setGerritReview, setGitHubPullRequestStatus, sh, sleep, sshagent, stage, stash, step, svn, timeout, timestamps, tool, unarchive, unstash, waitUntil, withContext, withCredentials, withDockerContainer, withDockerRegistry, withDockerServer, withEnv, wrap, writeFile, ws] or symbols [all, always, ant, antFromApache, antOutcome, antTarget, any, apiToken, architecture, archiveArtifacts, artifactManager, batchFile, booleanParam, branch, buildButton, buildDiscarder, caseInsensitive, caseSensitive, changeAbandoned, changeMerged, changeRestored, choice, choiceParam, clock, cloud, command, commentAdded, commentAddedContains, cron, crumb, defaultView, demand, disableConcurrentBuilds, docker, dockerfile, downloadSettings, downstream, draftPublished, dumb, envVars, environment, expression, file, fileParam, filePath, fingerprint, frameOptions, freeStyle, freeStyleJob, gerrit, git, hyperlink, hyperlinkToModels, installSource, jdk, jdkInstaller, jgit, jgitapache, jnlp, jobName, junit, label, lastDuration, lastFailure, lastGrantedAuthorities, lastStable, lastSuccess, legacy, list, local, location, logRotator, loggedInUsersCanDoAnything, masterBuild, maven, maven3Mojos, mavenErrors, mavenMojos, mavenWarnings, myView, nodeProperties, nonStoredPasswordParam, none, overrideIndexTriggers, paneStatus, parameters, password, patchsetCreated, pattern, pipeline-model, pipelineTriggers, plainText, plugin, pollSCM, projectNamingStrategy, proxy, queueItemAuthenticator, quietPeriod, refUpdated, run, runParam, schedule, scmRetryCount, search, security, shell, skipDefaultCheckout, skipStagesAfterUnstable, slave, stackTrace, standard, status, string, stringParam, swapSpace, text, textParam, tmpSpace, toolLocation, unsecured, upstream, usernameColonPassword, usernamePassword, viewsTabBar, weather, zfs, zip] or globals [currentBuild, docker, env, params, pipeline, scm]
i got it also on pipeline, and steps, removed them and got it on the post section

what do i miss to make it work?

thanks!