Redmine

I have Redmine set up to take in all email from an account on exchange, create a ticket and email the person back that a ticket has been created. A few services that have emailed the account do not have the ability to receive email, so Redmine gets the bounceback and goes into a spiral of trying to email the update for user and just continues over and over again. Just had 200+ emails over the weekend because of it.

I was wondering if there was a way to set a threshold on replies sent within a certain time frame or to a user to stop this if anyone knows.

Thanks in advance.

  Redmine version                2.5.1.stable
  Ruby version                   1.9.3-p545 (2014-02-24) [i686-linux]
  Rails version                  3.2.17
  Environment                    production
  Database adapter               Mysql2
SCM:
  Subversion                     1.6.11
  Git                            1.7.1
  Filesystem
Redmine plugins:
  clipboard_image_paste          1.8
  projects_tree_view             0.0.8
  redmine_contacts               3.2.17
  redmine_contacts_invoices      3.1.4
  redmine_custom_workflows       0.0.4
  redmine_improved_searchbox     0.0.3
  redmine_knowledgebase          3.0.4
  redmine_logs                   0.0.5
  redmine_monitoring_controlling 0.1.1
  redmine_people                 0.1.8
  redmine_zenedit                0.0.2
  unread_issues                  0.0.1