This script will be run after sending the email to allow acting upon the send result. The MimeMessage variable is msg, the SMTPTransport transport, the session properties props, the build is also available as build and a logger is available as logger. The trigger that caused the email is available as trigger and all triggered builds are available as a map triggered.

You can set the default post-send script here and then use ${DEFAULT_POSTSEND_SCRIPT} in the project settings to use the script written here.