Using the job-dsl-plugin to generate a maven job leads to Jenkins warning (on the 'manage' screen) that the job config is incorrect. The exact error is:

MissingFieldException: No field 'perModuleEmail' found in class 'hudson.maven.MavenModuleSet'

(Jenkins only checks for this as startup, so after generating the job you may have to reload the config from disk or restart jenkins to see the message)

This appears to be because the plugin adds 'perModuleEmail' to the top-level config, but as of JENKINS-21045 the location of this config has changed to be stored as a separate item instead of using the generic mailer job:

<reporters>
<hudson.maven.reporters.MavenMailer>
<recipients></recipients>
<dontNotifyEveryUnstableBuild>false</dontNotifyEveryUnstableBuild>
<sendToIndividuals>true</sendToIndividuals>
<perModuleEmail>false</perModuleEmail>
</hudson.maven.reporters.MavenMailer>
</reporters>

This is just cosmetic, though.

There's also no built-in way to set up this config within the plugin