/usr/share/maven-repo/org/apache/ant/ant-javamail/debian/ant-javamail-debian.jar is in ant-optional 1.9.6-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/apache/ant/ant-javamail/debian/../../../../../../java/ant-javamail-1.9.6.jar