Option do Change Hold Time

config/postal.defaults.yml

@@ -12,6 +12,7 @@ general:
   use_ip_pools: false
   exception_url:
   maximum_delivery_attempts: 18
+  maximum_hold_expiry_days: 7
   use_local_ns_for_domains: false
 
 web_server:

lib/postal/message_db/message.rb

@@ -126,7 +126,7 @@ module Postal
       #
       def create_delivery(status, options = {})
         delivery = Delivery.create(self, options.merge(:status => status))
-        hold_expiry = status == 'Held' ? 7.days.from_now.to_f : nil
+        hold_expiry = status == 'Held' ? Postal.config.general.maximum_hold_expiry_days.days.from_now.to_f : nil
         self.update(:status => status, :last_delivery_attempt => delivery.timestamp.to_f, :held => status == 'Held' ? 1 : 0, :hold_expiry => hold_expiry)
         delivery
       end