Redmine

https://github.com/rubynovich/redmine_contacts_helpdesk/blob/4aadaf80956/config/routes.rb#L15

match "helpdesk_mailer/get_mail" => "helpdesk_mailer#get_mail" 

I don't understand you advice. Shall I add, modify or delete this line (line 15)?
Are you sure this problem is related to the contacts plugin?

Our full plugins/redmine_contacts_helpdesk/config/routes.rb looks like this:

#custom routes for this plugin
resources :helpdesk_tickets, :only => [:edit, :destroy, :update]

resources :projects do
  resources :canned_responses, :only => [:new, :create]
end

resources :canned_responses do
  collection do
    post :add 
  end
end

match "helpdesk_mailer" => "helpdesk_mailer#index",:via => [:get, :post]
match "helpdesk_mailer/get_mail" => "helpdesk_mailer#get_mail", :via => [:get, :post, :put]
match "helpdesk/save_settings" => "helpdesk#save_settings", :via => [:get, :post, :put ]
match "helpdesk/get_mail" => "helpdesk#get_mail", :via => [:get, :post, :put]
match "helpdesk/delete_spam" => "helpdesk#delete_spam", :via => [:delete]
match "helpdesk/email_note.:format" => "helpdesk#email_note", :via => [:get, :post]
match "helpdesk/create_ticket.:format" => "helpdesk#create_ticket", :via => [:get, :post]
match "helpdesk/show_original" => "helpdesk#show_original", :via => [:get, :post]
match "helpdesk_reports/index/(:project_id)" => 'helpdesk_reports#index', :via => [:get, :post]
match "helpdesk_reports/staff_report/(:project_id)" => 'helpdesk_reports#staff_report', :via => [:get, :post]
match "helpdesk_reports/tickets_report/(:project_id)" => 'helpdesk_reports#tickets_report', :via => [:get, :post]

get "mail_fetcher/receive_imap" => "mail_fetcher#receive_imap" 
get "mail_fetcher/receive_pop3" => "mail_fetcher#receive_pop3" 

match 'tickets/:id/:hash' => 'public_tickets#show', :as => :public_ticket, :via => [:get, :post]
match 'tickets/:id/add_comment/:hash' => 'public_tickets#add_comment', :as => :public_ticket_add_comment, :via => [:get, :post]

match 'vote/:id/:hash' => 'helpdesk_votes#show', :via => :get, :as => 'helpdesk_votes_show'
match 'vote/:id/:hash' => 'helpdesk_votes#vote', :via => :post, :as => 'helpdesk_votes_vote'
match 'vote/:id/:vote/:hash' => 'helpdesk_votes#fast_vote', :via => :get, :as => 'helpdesk_votes_fast_vote'

get 'attachments/:id/:ticket_id/:hash/:filename', :to => 'attachments#show', :id => /\d+/, :filename => /.*/, :as => 'hashed_named_attachment'
get 'attachments/download_hashed/:id/:ticket_id/:hash/:filename', :to => 'attachments#download', :id => /\d+/, :filename => /.*/, :as => 'hashed_download_named_attachment'

Please contact plugin author.

We only have two plugins enabled:

As the author of the plugins stated, this seems not to be related to these plugins. Are there other plugins not visible here? Could you point me to the correct auther of these?

I have to clarify that this issue is listed in the daily reminder "...x issues are due in the next x days..." (I don't know the exact english version).

The issue that should not be listed there looks like this:

status_id looks like this:

We don't provide any technical support.