I have been trying to set the environment variables `GIT_AUTHOR_EMAIL` and `GIT_COMMITTER_EMAIL` so that the GIT plugin for Jenkins claims to be setting(<https://wiki.jenkins-ci.org/display/JENKINS/Git+Plugin>). 

I see that the rest of the environment variables viz. `GIT_URL`, `GIT_BRANCH`, `GIT_COMMIT`, `GIT_PREVIOUS_COMMIT` are set accurately for each of the jenkins jobs. 

I am testing this by printing out all the environment variables in a jenkins jobs shell script build step by using `printenv`. 

Can somebody please let me know if I am missing something here ?
Here are few of the possible reasons that I could think of..

1. Bug with the plugin
2. Issue with Jenkins setup/config
3. Issue with GIT config in Github..

Please help me in this regard. 

Thanks!

p.s. I also saw a similar question is left unanswered ([Github-plugin for Jenkins get committer and author name](https://stackoverflow.com/questions/22256083/github-plugin-for-jenkins-get-committer-and-author-name))