I'm using Jenkins ver. 1.642 and 2.40.5 of the email extension plugin.

Last night we started receiving the emails with the following content:

${PROJECT_NAME} - Build # ${BUILD_NUMBER} - $BUILD_STATUS
Check console output at $BUILD_URL to view the results.
${CHANGES}
${JELLY_SCRIPT, template="html"}

variables were not expanding and the jelly template was not being applied