Alex Arnaud
--- a/library/Class/SessionActivityInscription.php
+++ b/library/Class/SessionActivityInscription.php
      ->getSessionActivity()
      ->removeSessionActivityInscription($this);

-    $this->_sendUnsubscribeEmail();
--- a/library/Class/SessionActivity.php
+++ b/library/Class/SessionActivity.php
  public function numberOfAttendeesInQueue() {
    return $this->_getAttendees()->countInQueue();
  }
+
+
+  public function delete()
+  {
+    foreach ($this->getSessionActivityInscriptions() as $inscription)
+      if (!$this->isDateSubscriptionExhausted())
+        $inscription->sendUnsubscribeEmail();
+
+    parent::delete();
+  }
 }
--- a/library/ZendAfi/Controller/Plugin/Manager/AbonneSessionActivity.php
+++ b/library/ZendAfi/Controller/Plugin/Manager/AbonneSessionActivity.php
    if (!$this->_user->save())
      return $this->_redirectToUrlOrReferer($this->_redirect_default_url);

+    $inscription->sendUnsubscribeEmail();
--- a/library/ZendAfi/Controller/Plugin/Manager/SessionActivityInscription.php
+++ b/library/ZendAfi/Controller/Plugin/Manager/SessionActivityInscription.php

  public function unsubscribeAction() {
    parent::deleteAction();
+    $this->_model->sendUnsubscribeEmail();