diff --git a/addons/web_editor/static/src/js/editor/transcoder.js b/addons/web_editor/static/src/js/editor/transcoder.js
index bdc801b3a4b..488cf5a8177 100644
--- a/addons/web_editor/static/src/js/editor/transcoder.js
+++ b/addons/web_editor/static/src/js/editor/transcoder.js
@@ -287,7 +287,7 @@ function classToStyle($editable) {
 
         // Outlook
         if (node.nodeName === 'A' && $target.hasClass('btn') && !$target.hasClass('btn-link') && !$target.children().length) {
-            var $hack = $('<table class="o_outlook_hack" style="display: inline-table;"><tr><td></td></tr></table>');
+            var $hack = $('<table class="o_outlook_hack" style="display: inline-table;vertical-align:middle"><tr><td></td></tr></table>');
             $hack.find('td')
                 .attr('height', $target.outerHeight())
                 .css({
diff --git a/odoo/tools/mail.py b/odoo/tools/mail.py
index 96d8d5614ff..266cb4f20c4 100644
--- a/odoo/tools/mail.py
+++ b/odoo/tools/mail.py
@@ -45,7 +45,7 @@ class _Cleaner(clean.Cleaner):
     _style_whitelist = [
         'font-size', 'font-family', 'font-weight', 'background-color', 'color', 'text-align',
         'line-height', 'letter-spacing', 'text-transform', 'text-decoration',
-        'float', 'vertical-align',
+        'float', 'vertical-align', 'display',
         'padding', 'padding-top', 'padding-left', 'padding-bottom', 'padding-right',
         'margin', 'margin-top', 'margin-left', 'margin-bottom', 'margin-right',
         # box model