diff --git a/app/controllers/managements_controller.rb b/app/controllers/managements_controller.rb
index b3d944f5..74f74f9a 100644
--- a/app/controllers/managements_controller.rb
+++ b/app/controllers/managements_controller.rb
@@ -3043,6 +3043,7 @@ end
                 user.grade = 0
                 user.password = "12345678"
                 user.phone = list[5].blank? ? nil : list[5]
+                user.mail = nil
                 if user.save
                   ue = UserExtensions.new(:user_id => user.id, :gender => 0, :school_id => school_id, :location => school.province, :location_city => school.city, :identity => list[3].to_i, :student_id => list[0].to_s.strip, :department_id => department.try(:id))
                   if list[3] && list[3].to_i == 0