fix the method caller in mailfeerule comparator.
fix the method caller in mailfeerule comparator.

WillianPaiva/1flow,WillianPaiva/1flow,1flow/1flow,1flow/1flow,WillianPaiva/1flow,1flow/1flow,1flow/1flow,WillianPaiva/1flow,1flow/1flow,WillianPaiva/1flow