We use Maven build jobs and in a case of a build failure send a mail with the email-ext plugin.
With the default template ${SCRIPT, template="groovy-text.template"} the mail contains the last 100 lines of the build log.
In cases of missing or wrong maven dependencies the mail ends always with <===[JENKINS REMOTING CAPACITY]===>

The important error information is missing, but are shown in the console log via the web interface.
For example:

[INFO] Resolving dependencies of MavenProject: xxx
[INFO] {osgi.ws=win32, osgi.os=win32, osgi.arch=x86_64, org.eclipse.update.install.features=true}
[ERROR] Cannot resolve project dependencies:
[ERROR] Software being installed: ...
[ERROR] Missing requirement: ....

The build log should be fixed to contain also this kind of information.