intrigeri authored Sep 23, 2019 and ng committed Jan 04, 2020

The automated message detection heuristic already let messages sent by cron
through. This makes sense, as there are valid use cases for sending email from
cronjobs to a Schleuder list. Similarly, there are valid use cases for sending
Jenkins job notifications to a Schleuder list. But so far we rejected these
messages: they include a Auto-Submitted header whose value is not "no".

To fix this problem, let's allow auto-submitted email when a X-Jenkins-Job
header is present.

For reference, as of current Jenkins LTS (2.176.3) running on Debian Stretch
with Java 8, messages generated by the Jenkins Mailer¹ plugin include
characteristic headers; for example:

  X-Jenkins-Job: test_Tails_ISO_stable
  X-Jenkins-Result: FAILURE
  Auto-submitted: auto-generated

[1] https://github.com/jenkinsci/mailer-plugin