diff --git a/app/views/administration_mailer/dossier_expiration_summary.html.haml b/app/views/administration_mailer/dossier_expiration_summary.html.haml
index dc9488ca3..6a15b618c 100644
--- a/app/views/administration_mailer/dossier_expiration_summary.html.haml
+++ b/app/views/administration_mailer/dossier_expiration_summary.html.haml
@@ -1,7 +1,7 @@
 - content_for(:title, 'Expiration du délai de conservation des dossiers')
 
 - if @expired_dossiers.present?
-  %h1= t('mail.administration.dossier_expiration_summary.expired_dossiers', count: @expired_dossiers.count)
+  %h2= t('mail.administration.dossier_expiration_summary.expired_dossiers', count: @expired_dossiers.count)
   - @expired_dossiers.group_by(&:procedure).each do |procedure, dossiers|
     %dl
       %dt
@@ -10,7 +10,7 @@
         = dossiers.map { |d| link_to(d.id, manager_dossier_url(d)) }.join(', ').html_safe
 
 - if @expiring_dossiers.present?
-  %h1= t('mail.administration.dossier_expiration_summary.expiring_dossiers', count: @expiring_dossiers.count)
+  %h2= t('mail.administration.dossier_expiration_summary.expiring_dossiers', count: @expiring_dossiers.count)
   - @expiring_dossiers.group_by(&:procedure).each do |procedure, dossiers|
     %dl
       %dt
diff --git a/app/views/avis_mailer/avis_invitation.html.haml b/app/views/avis_mailer/avis_invitation.html.haml
index bf39822b7..860e0d256 100644
--- a/app/views/avis_mailer/avis_invitation.html.haml
+++ b/app/views/avis_mailer/avis_invitation.html.haml
@@ -1,5 +1,4 @@
-- content_for(:title, 'Vous avez été invité à donner votre avis')
-
+- content_for(:title, 'Invitation à donner votre avis')
 - avis_link = @avis.gestionnaire.present? ? gestionnaire_avis_url(@avis) : sign_up_gestionnaire_avis_url(@avis.id, @avis.email)
 
 - content_for(:footer) do
@@ -21,7 +20,7 @@
 %p
   = "#{@avis.claimant.email} vous a écrit :"
   %br
-%p{ style: "padding: 8px; color: #333333; background-color: #EEEEEE; font-size: 16px;" }
+%p{ style: "padding: 8px; color: #333333; background-color: #EEEEEE; font-size: 14px;" }
   = @avis.introduction
 
 - if @avis.gestionnaire.present?
diff --git a/app/views/gestionnaire_mailer/last_week_overview.html.haml b/app/views/gestionnaire_mailer/last_week_overview.html.haml
index 6486b6807..43b2950ae 100644
--- a/app/views/gestionnaire_mailer/last_week_overview.html.haml
+++ b/app/views/gestionnaire_mailer/last_week_overview.html.haml
@@ -1,8 +1,14 @@
 - content_for(:title, @subject)
 
+%p
+  Bonjour,
+
+%p
+  Voici le résumé de votre activité hebdomadaire :
+
 - @overview[:procedure_overviews].each_with_index do |procedure_overview, index|
 
-  %h2{ style: 'font-size: 20px; font-weight: 300; margin: 25px 0 5px;' }
+  %h2{ style: 'font-size: 16px; font-weight: 300; margin: 25px 0 5px;' }
     #{procedure_overview.procedure.libelle}
     = link_to 'voir', gestionnaire_procedure_url(procedure_overview.procedure), style: 'color: #0069CC; font-size: 14px;'
   %table{ cellpadding: '0', cellspacing: '0', style: 'width: 100%; padding-bottom: 20px;' }
diff --git a/app/views/invite_mailer/invite_guest.html.haml b/app/views/invite_mailer/invite_guest.html.haml
index 27fe008dd..2b30029d2 100644
--- a/app/views/invite_mailer/invite_guest.html.haml
+++ b/app/views/invite_mailer/invite_guest.html.haml
@@ -4,7 +4,9 @@
 %p
   L'utilisateur
   = @invite.email_sender
-  souhaite que vous participiez à l'élaboration d'un dossier sur demarches-simplifiees.fr.
+  souhaite que vous participiez à l'élaboration d'un dossier pour la démarche
+  %strong= @invite.dossier.procedure.libelle
+  sur demarches-simplifiees.fr.
 
 %p
   Cette plateforme permet à ses utilisateurs d'établir des dossiers 100 % en ligne et de dialoguer avec plusieurs interlocuteurs privilégiés avant d'instruire un dépot.
diff --git a/spec/mailers/previews/administrateur_mailer_preview.rb b/spec/mailers/previews/administrateur_mailer_preview.rb
index 67e6a54b9..afa8762a0 100644
--- a/spec/mailers/previews/administrateur_mailer_preview.rb
+++ b/spec/mailers/previews/administrateur_mailer_preview.rb
@@ -1,5 +1,7 @@
 class AdministrateurMailerPreview < ActionMailer::Preview
   def activate_before_expiration
-    AdministrateurMailer.activate_before_expiration(Administrateur.inactive.where.not(reset_password_token: nil).last)
+    administrateur = Administrateur.new(reset_password_sent_at: Time.now.utc)
+
+    AdministrateurMailer.activate_before_expiration(administrateur, "a4d4e4f4b4d445")
   end
 end
diff --git a/spec/mailers/previews/administration_mailer_preview.rb b/spec/mailers/previews/administration_mailer_preview.rb
index 7e5633c31..0aaa8a069 100644
--- a/spec/mailers/previews/administration_mailer_preview.rb
+++ b/spec/mailers/previews/administration_mailer_preview.rb
@@ -1,17 +1,42 @@
 class AdministrationMailerPreview < ActionMailer::Preview
   def dubious_procedures
     procedures_and_champs = [
-      [Procedure.first, [TypeDeChamp.new(libelle: 'iban'), TypeDeChamp.new(libelle: 'religion')]],
-      [Procedure.last, [TypeDeChamp.new(libelle: 'iban'), TypeDeChamp.new(libelle: 'numéro de carte bleu')]]
+      [procedure_1, [TypeDeChamp.new(libelle: 'iban'), TypeDeChamp.new(libelle: 'religion')]],
+      [procedure_2, [TypeDeChamp.new(libelle: 'iban'), TypeDeChamp.new(libelle: 'numéro de carte bleu')]]
     ]
     AdministrationMailer.dubious_procedures(procedures_and_champs)
   end
 
   def invite_admin
-    AdministrationMailer.invite_admin(Administrateur.last, "12345678", 0)
+    AdministrationMailer.invite_admin(administrateur, "12345678", 0)
   end
 
   def refuse_admin
     AdministrationMailer.refuse_admin('bad_admin@pipo.com')
   end
+
+  def new_admin
+    administration = Administration.new(email: 'superadmin@demarches-simplifiees.fr')
+    AdministrationMailer.new_admin_email(administrateur, administration)
+  end
+
+  def dossier_expiration_summary
+    expiring_dossiers = [Dossier.new(id: 100, procedure: procedure_1)]
+    expired_dossiers = [Dossier.new(id: 100, procedure: procedure_2)]
+    AdministrationMailer.dossier_expiration_summary(expiring_dossiers, expired_dossiers)
+  end
+
+  private
+
+  def procedure_1
+    Procedure.new(id: 10, libelle: "Démarche des marches", administrateur: administrateur)
+  end
+
+  def procedure_2
+    Procedure.new(id: 20, libelle: "Démarche pieds", administrateur: administrateur)
+  end
+
+  def administrateur
+    Administrateur.new(id: 111, email: "chef.de.service@administration.gouv.fr")
+  end
 end
diff --git a/spec/mailers/previews/avis_mailer_preview.rb b/spec/mailers/previews/avis_mailer_preview.rb
index be78eae74..72d715f93 100644
--- a/spec/mailers/previews/avis_mailer_preview.rb
+++ b/spec/mailers/previews/avis_mailer_preview.rb
@@ -1,6 +1,11 @@
 # Preview all emails at http://localhost:3000/rails/mailers/avis_mailer
 class AvisMailerPreview < ActionMailer::Preview
   def avis_invitation
-    AvisMailer.avis_invitation(Avis.last)
+    gestionaire = Gestionnaire.new(id: 1, email: 'jeanmichel.de-chauvigny@exemple.fr')
+    avis = Avis.new(id: 1, email: 'test@exemple.fr', claimant: gestionaire)
+    avis.dossier = Dossier.new(id: 1)
+    avis.dossier.procedure = Procedure.new(libelle: 'Démarche pour faire des marches')
+    avis.introduction = 'Il faudrait vérifier le certificat de conformité.'
+    AvisMailer.avis_invitation(avis)
   end
 end
diff --git a/spec/mailers/previews/devise_user_mailer_preview.rb b/spec/mailers/previews/devise_user_mailer_preview.rb
index fdaab876b..6aea003ec 100644
--- a/spec/mailers/previews/devise_user_mailer_preview.rb
+++ b/spec/mailers/previews/devise_user_mailer_preview.rb
@@ -1,9 +1,15 @@
 class DeviseUserMailerPreview < ActionMailer::Preview
   def confirmation_instructions
-    DeviseUserMailer.confirmation_instructions(User.first, "faketoken", {})
+    DeviseUserMailer.confirmation_instructions(user, "faketoken", {})
   end
 
   def reset_password_instructions
-    DeviseUserMailer.reset_password_instructions(User.first, "faketoken", {})
+    DeviseUserMailer.reset_password_instructions(user, "faketoken", {})
+  end
+
+  private
+
+  def user
+    User.new(id: 10, email: "usager@example.com")
   end
 end
diff --git a/spec/mailers/previews/dossier_mailer_preview.rb b/spec/mailers/previews/dossier_mailer_preview.rb
index de22920f6..b914b27c5 100644
--- a/spec/mailers/previews/dossier_mailer_preview.rb
+++ b/spec/mailers/previews/dossier_mailer_preview.rb
@@ -1,18 +1,32 @@
 # Preview all emails at http://localhost:3000/rails/mailers/dossier_mailer
 class DossierMailerPreview < ActionMailer::Preview
   def notify_new_draft
-    DossierMailer.notify_new_draft(Dossier.last)
+    DossierMailer.notify_new_draft(dossier)
   end
 
   def notify_new_answer
-    DossierMailer.notify_new_answer(Dossier.last)
+    DossierMailer.notify_new_answer(dossier)
   end
 
   def notify_deletion_to_user
-    DossierMailer.notify_deletion_to_user(DeletedDossier.last, "user@ds.fr")
+    DossierMailer.notify_deletion_to_user(deleted_dossier, "user@ds.fr")
   end
 
   def notify_deletion_to_administration
-    DossierMailer.notify_deletion_to_administration(DeletedDossier.last, "admin@ds.fr")
+    DossierMailer.notify_deletion_to_administration(deleted_dossier, "admin@ds.fr")
+  end
+
+  private
+
+  def deleted_dossier
+    DeletedDossier.new(dossier_id: 1, procedure: procedure)
+  end
+
+  def dossier
+    Dossier.new(id: 1, procedure: procedure, user: User.new(email: "usager@example.com"))
+  end
+
+  def procedure
+    Procedure.new(libelle: 'Démarche pour des marches')
   end
 end
diff --git a/spec/mailers/previews/gestionnaire_mailer_preview.rb b/spec/mailers/previews/gestionnaire_mailer_preview.rb
index d7707bd22..ddafd66b4 100644
--- a/spec/mailers/previews/gestionnaire_mailer_preview.rb
+++ b/spec/mailers/previews/gestionnaire_mailer_preview.rb
@@ -1,14 +1,35 @@
 class GestionnaireMailerPreview < ActionMailer::Preview
   def last_week_overview
-    gestionnaire = Gestionnaire.first
-    GestionnaireMailer.last_week_overview(gestionnaire)
+    GestionnaireMailer.last_week_overview(Gestionnaire.first)
   end
 
   def send_dossier
-    GestionnaireMailer.send_dossier(Gestionnaire.first, Dossier.first, Gestionnaire.last)
+    GestionnaireMailer.send_dossier(gestionnaire, Dossier.new(id: 10, procedure: procedure), target_gestionnaire)
   end
 
   def send_login_token
-    GestionnaireMailer.send_login_token(Gestionnaire.first, "token")
+    GestionnaireMailer.send_login_token(gestionnaire, "token")
+  end
+
+  def invite_gestionnaire
+    GestionnaireMailer.invite_gestionnaire(gestionnaire, 'aedfa0d0')
+  end
+
+  def user_to_gestionnaire
+    GestionnaireMailer.user_to_gestionnaire(gestionnaire.email)
+  end
+
+  private
+
+  def gestionnaire
+    Gestionnaire.new(id: 10, email: 'instructeur@administration.gouv.fr')
+  end
+
+  def target_gestionnaire
+    Gestionnaire.new(id: 12, email: 'collegue@administration.gouv.fr')
+  end
+
+  def procedure
+    Procedure.new(id: 15)
   end
 end
diff --git a/spec/mailers/previews/user_mailer_preview.rb b/spec/mailers/previews/user_mailer_preview.rb
index d2dfa3e70..4204d63be 100644
--- a/spec/mailers/previews/user_mailer_preview.rb
+++ b/spec/mailers/previews/user_mailer_preview.rb
@@ -1,5 +1,11 @@
 class UserMailerPreview < ActionMailer::Preview
   def new_account_warning
-    UserMailer.new_account_warning(User.first)
+    UserMailer.new_account_warning(user)
+  end
+
+  private
+
+  def user
+    User.new(id: 10, email: 'test@exemple.fr')
   end
 end