diff --git a/VERSIONS_HOTLINE/55821 b/VERSIONS_HOTLINE/55821
new file mode 100644
index 0000000000000000000000000000000000000000..e0d4f4b3dbb43f63e32cd3907157b918e2322bb9
--- /dev/null
+++ b/VERSIONS_HOTLINE/55821
@@ -0,0 +1 @@
+ - ticket #55821 : administration des suggestions d'achat: le lien pour envoyer un mail est compatible avec le client de messagerie Zimbra 7
\ No newline at end of file
diff --git a/application/modules/admin/views/scripts/suggestion-achat/index.phtml b/application/modules/admin/views/scripts/suggestion-achat/index.phtml
index ff3146a5b94ddf8d2eef7a1f1deec87ccade79d2..fe4a1c6274e10824148aa2cd0245f6eae05b7b72 100644
--- a/application/modules/admin/views/scripts/suggestion-achat/index.phtml
+++ b/application/modules/admin/views/scripts/suggestion-achat/index.phtml
@@ -33,7 +33,7 @@ $_actions = [$_edit_action,
             function($model) {
                 return ($model->hasUserMail())
                              ? $this->boutonIco('type=MAIL',
-                                                'mailto='.$model->getUserMail().'?Subject='.rawurlencode($this->_('Suggestion d\'achat:').' '.$model->getTitre()))
+                                                'mailto='.$model->getUserMail().'?subject='.rawurlencode($this->_('Suggestion d\'achat:').' '.$model->getTitre()))
                                                                                                                                                 : '';},
             $_delete_action ];
 
diff --git a/tests/application/modules/admin/controllers/ModoControllerTest.php b/tests/application/modules/admin/controllers/ModoControllerTest.php
index aaa4ed63000f0d3055fc82675955292a93abf3f7..4b99ca58da67275d410595855ab5101fc835811f 100644
--- a/tests/application/modules/admin/controllers/ModoControllerTest.php
+++ b/tests/application/modules/admin/controllers/ModoControllerTest.php
@@ -432,7 +432,7 @@ class ModoControllerSuggestionAchatActionTest extends ModoControllerSuggestionAc
 
   /** @test */
   public function firstRowActionsShouldContainsLinkToMailUser() {
-    $this->assertXPath('//tbody//tr[1]//td//a[@href="mailto:ppoucet@afi.com?Subject=Suggestion%20d%27achat%3A%20Harry%20Potter"]');
+    $this->assertXPath('//tbody//tr[1]//td//a[@href="mailto:ppoucet@afi.com?subject=Suggestion%20d%27achat%3A%20Harry%20Potter"]');
   }