diff --git a/app/controllers/events_controller.rb b/app/controllers/events_controller.rb
index 2df4eb16..62b423c2 100644
--- a/app/controllers/events_controller.rb
+++ b/app/controllers/events_controller.rb
@@ -35,7 +35,7 @@ class EventsController < ApplicationController
   # POST /events.json
   def create
     respond_to do |format|
-      if @event.save && send_creation_mails
+      if @event.save
         format.html { redirect_to :root, notice: t('.ok') }
         # 201 means :created
         format.json { render action: 'show', status: 201, location: @event }
@@ -58,7 +58,7 @@ class EventsController < ApplicationController
   # PATCH/PUT /events/1.json
   def update
     respond_to do |format|
-      if @event.update(event_params) && send_update_mails
+      if @event.update event_params
         format.html { redirect_to :root, notice: t('.ok') }
         format.json { head :no_content }
       else
@@ -108,26 +108,14 @@ class EventsController < ApplicationController
               :contact, :submitter, :tags
   end
 
+  def locked
+    redirect_to edit_event_url(@event, secret: @event.secret),
+                alert: t('staleObjectError')
+  end
+
   # Check that you can only edit an existing event if you know its secret
   def check_secret
     redirect_to :root, alert: t(:forbidden, scope: [:events, :edit]) \
       unless params[:secret] == @event.secret
   end
-
-  def send_creation_mails
-    # Send an event creation mail to its author
-    EventMailer.create(@event).deliver_now
-    # Send a mail to moderators
-    ModerationMailer.create(@event).deliver_now
-  end
-
-  def send_update_mails
-    # Send an update mail to moderators
-    ModerationMailer.update(@event, nil).deliver_now
-  end
-
-  def locked
-    redirect_to edit_event_url(@event, secret: @event.secret),
-                alert: t('staleObjectError')
-  end
 end
diff --git a/app/controllers/moderations_controller.rb b/app/controllers/moderations_controller.rb
index 6070cd62..75698e52 100644
--- a/app/controllers/moderations_controller.rb
+++ b/app/controllers/moderations_controller.rb
@@ -20,7 +20,7 @@ class ModerationsController < ApplicationController
   # PATCH/PUT /moderations/1.json
   def update
     respond_to do |format|
-      if @moderation.update_attributes(moderation_params) && send_mails
+      if @moderation.update_attributes moderation_params
         format.html { redirect_to :moderations, notice: t('.ok') }
         format.json { head :no_content }
       else
@@ -35,7 +35,6 @@ class ModerationsController < ApplicationController
   # PATCH/PUT /accept/1.json
   def accept
     @moderation.update moderated: true
-    send_accept_mails
     respond_to do |format|
       format.html { redirect_to :moderations, notice: t('.ok') }
       format.json { head :no_content }
@@ -45,7 +44,8 @@ class ModerationsController < ApplicationController
   # DELETE /events/1
   # DELETE /events/1.json
   def destroy
-    send_destroy_mails if @moderation.destroy
+    @moderation.reason_for_deletion = get_reason_from_params params[:reason]
+    @moderation.destroy!
     respond_to do |format|
       format.html { redirect_to :moderations, notice: t('.ok') }
       format.json { head :no_content }
@@ -74,45 +74,15 @@ class ModerationsController < ApplicationController
     ActionMailer::Base.default_url_options[:host] = request.host_with_port
   end
 
-  def send_mails
-    # Send an update mail to moderators
-    ModerationMailer.update(@moderation, current_user).deliver_now
-  end
-
-  def send_accept_mails
-    tweet
-
-    # Send an acceptation mail to its author
-    EventMailer.accept(@moderation, current_user).deliver_now
-
-    # Send an acceptation mail to moderators
-    ModerationMailer.accept(@moderation, current_user).deliver_now
-  end
-
-  # Tweet this event, if configured using apache/system variables!
-  def tweet
-    client = Twitter::REST::Client.new do |config|
-      config.consumer_key        = ENV['TWITTER_CONSUMER_KEY']
-      config.consumer_secret     = ENV['TWITTER_CONSUMER_SECRET']
-      config.access_token        = ENV['TWITTER_ACCESS_TOKEN']
-      config.access_token_secret = ENV['TWITTER_ACCESS_SECRET']
-    end
-    client.update "#{@event.to_tweet event_url(@event)}" if client.consumer_key
-  end
-
-  def send_destroy_mails
-    # Send a notification to its author
-    if params[:reason] == 'r_4'
-      @reason = params[:reason_text]
-    else
-      @reason = t "moderations.refuse.reason_#{params[:reason]}_long"
-    end
-
-    EventMailer.destroy(@moderation, current_user, @reason).deliver_now
-    ModerationMailer.destroy(@moderation, current_user, @reason).deliver_now
-  end
-
   def locked
     redirect_to edit_moderation_url(@moderation), alert: t('staleObjectError')
   end
+
+  def get_reason_from_params(reason)
+    if reason == 'r_4'
+      reason
+    else
+      t "moderations.refuse.reason_#{reason}_long"
+    end
+  end
 end
diff --git a/app/mailers/event_mailer.rb b/app/mailers/event_mailer.rb
index 050ea3d4..1661ae98 100644
--- a/app/mailers/event_mailer.rb
+++ b/app/mailers/event_mailer.rb
@@ -12,9 +12,9 @@ class EventMailer < ApplicationMailer
                                          subject: event.title}"
   end
 
-  def accept(event, current_user)
+  def accept(event)
     @event = event
-    @current_user = current_user
+    @current_user = User.find_by id: event.paper_trail_originator
 
     mail 'In-Reply-To' =>
       "<event-#{event.id}@#{ActionMailer::Base.default_url_options[:host]}>",
@@ -23,10 +23,9 @@ class EventMailer < ApplicationMailer
                                          subject: event.title}"
   end
 
-  def destroy(event, current_user, reason)
+  def destroy(event)
     @event = event
-    @current_user = current_user
-    @reason = reason
+    @current_user = User.find_by id: event.paper_trail_originator
 
     mail 'In-Reply-To' =>
       "<event-#{event.id}@#{ActionMailer::Base.default_url_options[:host]}>",
diff --git a/app/mailers/moderation_mailer.rb b/app/mailers/moderation_mailer.rb
index 59e413c5..694cbfd3 100644
--- a/app/mailers/moderation_mailer.rb
+++ b/app/mailers/moderation_mailer.rb
@@ -11,9 +11,9 @@ class ModerationMailer < ApplicationMailer
                                          subject: event.title}"
   end
 
-  def update(event, current_user)
+  def update(event)
     @event = event
-    @current_user = current_user
+    @current_user = User.find_by id: event.paper_trail_originator
 
     mail 'In-Reply-To' =>
       "<mod-#{event.id}@#{ActionMailer::Base.default_url_options[:host]}>",
@@ -21,9 +21,9 @@ class ModerationMailer < ApplicationMailer
                                          subject: event.title}"
   end
 
-  def accept(event, current_user)
+  def accept(event)
     @event = event
-    @current_user = current_user
+    @current_user = User.find_by id: event.paper_trail_originator
 
     mail 'In-Reply-To' =>
       "<mod-#{event.id}@#{ActionMailer::Base.default_url_options[:host]}>",
@@ -31,10 +31,9 @@ class ModerationMailer < ApplicationMailer
                                          subject: event.title}"
   end
 
-  def destroy(event, current_user, reason)
+  def destroy(event)
     @event = event
-    @current_user = current_user
-    @reason = reason
+    @current_user = User.find_by id: event.paper_trail_originator
 
     mail 'In-Reply-To' =>
       "<mod-#{event.id}@#{ActionMailer::Base.default_url_options[:host]}>",
diff --git a/app/models/event.rb b/app/models/event.rb
index 5c75c582..6a91dd38 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -23,6 +23,12 @@ class Event < ActiveRecord::Base
   # after_validation :geocode, if: -> (obj) { obj.address_changed? }
   after_validation :geocode
 
+  attr_accessor :reason_for_deletion
+
+  after_create EventCallbacks
+  after_update EventCallbacks
+  after_destroy EventCallbacks
+
   scope :moderated, -> { where moderated: true }
   scope :unmoderated, -> { where moderated: false }
   scope :last_year, -> { where '? <= end_time', 1.year.ago }
@@ -72,19 +78,14 @@ class Event < ActiveRecord::Base
   end
 
   before_update do
-    if moderated? && moderated_was != moderated
-      self.decision_time = Time.zone.now
-    end
+    self.decision_time = Time.zone.now if moderated? && moderated_changed?
   end
 
   def as_json(_options = {})
     popup = "<a href=\"/#{self.class.name.downcase.pluralize}/#{id}\""
     popup += " >#{start_time.to_date} #{city}: #{title}</a>"
     { type: 'Feature', properties: {
-      id: id,
-      name: title,
-      tags: tags,
-      popupContent: popup
+      id: id, name: title, tags: tags, popupContent: popup
     }, geometry: {
       type: 'Point', coordinates: [longitude, latitude]
     } }
diff --git a/app/models/event_callbacks.rb b/app/models/event_callbacks.rb
new file mode 100644
index 00000000..1d8f90a4
--- /dev/null
+++ b/app/models/event_callbacks.rb
@@ -0,0 +1,38 @@
+# All the mail and tweet related callbacks to event's lifecycle
+class EventCallbacks
+  def self.after_create(event)
+    EventMailer.create(event).deliver_now!
+    ModerationMailer.create(event).deliver_now!
+  end
+
+  def self.after_update(event)
+    if event.moderated_changed?
+      tweet(event)
+
+      # Send an acceptation mail to its author
+      EventMailer.accept(event).deliver_now
+
+      # Send an acceptation mail to moderators
+      ModerationMailer.accept(event).deliver_now
+    else
+      # Send an update mail to moderators
+      ModerationMailer.update(event).deliver_now
+    end
+  end
+
+  def self.after_destroy(event)
+    EventMailer.destroy(event).deliver_now
+    ModerationMailer.destroy(event).deliver_now
+  end
+
+  # Tweet this event, if configured using apache/system variables!
+  def self.tweet(event)
+    client = Twitter::REST::Client.new do |config|
+      config.consumer_key        = ENV['TWITTER_CONSUMER_KEY']
+      config.consumer_secret     = ENV['TWITTER_CONSUMER_SECRET']
+      config.access_token        = ENV['TWITTER_ACCESS_TOKEN']
+      config.access_token_secret = ENV['TWITTER_ACCESS_SECRET']
+    end
+    client.update "#{event.to_tweet event_url(event)}" if client.consumer_key
+  end
+end
diff --git a/app/views/event_mailer/destroy.text.haml b/app/views/event_mailer/destroy.text.haml
index fbdb16e2..a4c33362 100644
--- a/app/views/event_mailer/destroy.text.haml
+++ b/app/views/event_mailer/destroy.text.haml
@@ -1,6 +1,6 @@
 = t '.body', author: @current_user
 \
-= @reason
+= @event.reason_for_deletion
 \
 = t '.reclamation'
 \
diff --git a/app/views/events/index.html.haml b/app/views/events/index.html.haml
index bff31295..72892279 100644
--- a/app/views/events/index.html.haml
+++ b/app/views/events/index.html.haml
@@ -48,11 +48,10 @@
   = raw t '.calendar_in',
     rss: link_to('RSS', events_path(:rss,
       tag: params[:tag], region: params[:region])),
-    webcal: link_to('webcal', events_path(tag: params[:tag], protocol: 'webcal', format: :ics, tag: params[:tag],
-      region: params[:region])),
+    webcal: link_to('webcal', events_path(tag: params[:tag],
+      protocol: 'webcal', format: :ics, region: params[:region])),
     ical: link_to('iCal', events_path(:rss,
-      tag: params[:tag], format: :ics, tag: params[:tag],
-      region: params[:region]))
+      tag: params[:tag], format: :ics, region: params[:region]))
 
 %a#banner(href='http://april.org/campagne')
   -# %img(src='http://www.april.org/campagne/images/priorite-logiciel-libre-je-soutiens-april.png'
diff --git a/app/views/moderation_mailer/destroy.text.haml b/app/views/moderation_mailer/destroy.text.haml
index 3867f329..1e7fa269 100644
--- a/app/views/moderation_mailer/destroy.text.haml
+++ b/app/views/moderation_mailer/destroy.text.haml
@@ -1,6 +1,6 @@
 = t '.body', subject: @event.title, author: @current_user
 \
-= @reason
+= @event.reason_for_deletion
 \
 = t '.reminder'
 = render file: '/events/show'
diff --git a/test/mailers/event_mailer_test.rb b/test/mailers/event_mailer_test.rb
index 0cd0cc35..be74ee04 100644
--- a/test/mailers/event_mailer_test.rb
+++ b/test/mailers/event_mailer_test.rb
@@ -16,14 +16,16 @@ class EventMailerTest < ActionMailer::TestCase
   end
 
   test 'accept' do
-    mail = EventMailer.accept Event.last, User.last
+    mail = EventMailer.accept Event.last
     assert_match(/Événement .* modéré/, mail.subject)
     assert_equal [Event.last.contact], mail.to
     assert_equal ['moderateurs@agendadulibre.org'], mail.from
   end
 
   test 'destroy' do
-    mail = EventMailer.destroy Event.last, User.last, 'hello world'
+    event = Event.last
+    event.reason_for_deletion = 'hello world'
+    mail = EventMailer.destroy Event.last
     assert_match(/Événement .* refusé/, mail.subject)
     assert_equal [Event.last.contact], mail.to
     assert_equal ['moderateurs@agendadulibre.org'], mail.from
diff --git a/test/mailers/moderation_mailer_test.rb b/test/mailers/moderation_mailer_test.rb
index 1204fbbe..1f1a30d4 100644
--- a/test/mailers/moderation_mailer_test.rb
+++ b/test/mailers/moderation_mailer_test.rb
@@ -25,7 +25,7 @@ class ModerationMailerTest < ActionMailer::TestCase
     event.description = event.description + '
 hello world'
 
-    mail = ModerationMailer.update event, User.last
+    mail = ModerationMailer.update event
     assert_match(/Édition de l'événement .*/, mail.subject)
     assert_equal ['moderateurs@agendadulibre.org'], mail.to
     assert_equal ['moderateurs@agendadulibre.org'], mail.from
@@ -34,15 +34,16 @@ hello world'
   end
 
   test 'accept' do
-    mail = ModerationMailer.accept Event.unscoped.last, User.last
+    mail = ModerationMailer.accept Event.unscoped.last
     assert_match(/Événement .* modéré/, mail.subject)
     assert_equal ['moderateurs@agendadulibre.org'], mail.to
     assert_equal ['moderateurs@agendadulibre.org'], mail.from
   end
 
   test 'destroy' do
-    mail = ModerationMailer.destroy Event.unscoped.last, User.last,
-                                    'hello world'
+    event = Event.unscoped.last
+    event.reason_for_deletion = 'hello world'
+    mail = ModerationMailer.destroy event
     assert_match(/Événement .* refusé/, mail.subject)
     assert_equal ['moderateurs@agendadulibre.org'], mail.to
     assert_equal ['moderateurs@agendadulibre.org'], mail.from
diff --git a/test/mailers/previews/event_mailer_preview.rb b/test/mailers/previews/event_mailer_preview.rb
index 6b593713..c665db26 100644
--- a/test/mailers/previews/event_mailer_preview.rb
+++ b/test/mailers/previews/event_mailer_preview.rb
@@ -9,12 +9,14 @@ class EventMailerPreview < ActionMailer::Preview
   # Preview this email at http://localhost:3000/rails/mailers/event_mailer/accept
   def accept
     ActionMailer::Base.default_url_options[:host] = 'localhost:3000'
-    EventMailer.accept Event.last, User.last
+    EventMailer.accept Event.last
   end
 
   # Preview this email at http://localhost:3000/rails/mailers/event_mailer/destroy
   def destroy
     ActionMailer::Base.default_url_options[:host] = 'localhost:3000'
-    EventMailer.destroy Event.last, User.last, 'hello world'
+    event = Event.last
+    event.reason_for_deletion = 'hello world'
+    EventMailer.destroy event
   end
 end
diff --git a/test/mailers/previews/moderation_mailer_preview.rb b/test/mailers/previews/moderation_mailer_preview.rb
index 325647b9..1567e0ad 100644
--- a/test/mailers/previews/moderation_mailer_preview.rb
+++ b/test/mailers/previews/moderation_mailer_preview.rb
@@ -9,25 +9,27 @@ class ModerationMailerPreview < ActionMailer::Preview
   # Preview this email at http://localhost:3000/rails/mailers/moderation_mailer/update
   def update
     ActionMailer::Base.default_url_options[:host] = 'localhost:3000'
-    event = Event.last
+    event = Event.first
 
     event.tags += ' ho'
     event.start_time += 1.day
     event.description = event.description + '
 hello world'
 
-    ModerationMailer.update event, nil
+    ModerationMailer.update event
   end
 
   # Preview this email at http://localhost:3000/rails/mailers/moderation_mailer/accept
   def accept
     ActionMailer::Base.default_url_options[:host] = 'localhost:3000'
-    ModerationMailer.accept Event.last, User.last
+    ModerationMailer.accept Event.last
   end
 
   # Preview this email at http://localhost:3000/rails/mailers/moderation_mailer/destroy
   def destroy
     ActionMailer::Base.default_url_options[:host] = 'localhost:3000'
-    ModerationMailer.destroy Event.last, User.last, 'hello world'
+    event = Event.last
+    event.reason_for_deletion = 'hello world'
+    ModerationMailer.destroy event
   end
 end
diff --git a/test/mailers/previews/orga_mailer_preview.rb b/test/mailers/previews/orga_mailer_preview.rb
index e2e23188..6505f7ae 100644
--- a/test/mailers/previews/orga_mailer_preview.rb
+++ b/test/mailers/previews/orga_mailer_preview.rb
@@ -24,6 +24,8 @@ class OrgaMailerPreview < ActionMailer::Preview
   # Preview this email at http://localhost:3000/rails/mailers/orga_mailer/destroy
   def destroy
     ActionMailer::Base.default_url_options[:host] = 'localhost:3000'
-    OrgaMailer.destroy Orga.last, 'hello world'
+    orga = Orga.last
+    # orga.reason_for_deletion = 'hello world'
+    OrgaMailer.destroy orga
   end
 end
diff --git a/test/models/event_test.rb b/test/models/event_test.rb
index ef011fa4..96a44328 100644
--- a/test/models/event_test.rb
+++ b/test/models/event_test.rb
@@ -3,6 +3,8 @@ require 'test_helper'
 # Test events, which are the application central part
 class EventTest < ActiveSupport::TestCase
   setup do
+    ActionMailer::Base.default_url_options[:host] = 'localhost:3000'
+
     @event = events :one
   end