Our configuration:
Job a triggers job B and transfers the build URL. Job B runs on a different slave that has the ability to send mails via ant (required because the cc and to properties are located in a xml file)
After adding LDAP security anon has no rights so finally the anon user (in job B running in ant) is not able to get the console-output of the triggered job via URL.

A file parameter deployed by the plugin may help, so job A can zip the console log and send it via file-parameter to job B - which now can attach it to the mail