diff --git a/addons/mail/models/mail_render_mixin.py b/addons/mail/models/mail_render_mixin.py
index e716ed18067..0f78ca97639 100644
--- a/addons/mail/models/mail_render_mixin.py
+++ b/addons/mail/models/mail_render_mixin.py
@@ -166,7 +166,7 @@ class MailRenderMixin(models.AbstractModel):
             r"""( # Group 1: element up to url in style
                 <[^>]+\bstyle=" # Element with a style attribute
                 [^"]+\burl\( # Style attribute contains "url(" style
-                (?:&\#34;|')?) # url style may start with (escaped) quote: capture it
+                (?:&\#34;|'|&quot;)?) # url style may start with (escaped) quote: capture it
             ( # Group 2: url itself
                 /(?:[^'")]|(?!&\#34;))+ # stop at the first closing quote
         )""", re.VERBOSE), _sub_relative2absolute, html)
diff --git a/addons/mass_mailing/wizard/mailing_mailing_test.py b/addons/mass_mailing/wizard/mailing_mailing_test.py
index a25edffc5b6..fe1d22fa68a 100644
--- a/addons/mass_mailing/wizard/mailing_mailing_test.py
+++ b/addons/mass_mailing/wizard/mailing_mailing_test.py
@@ -49,7 +49,6 @@ class TestMassMailing(models.TransientModel):
 
         # Convert links in absolute URLs before the application of the shortener
         full_body = self.env['mail.render.mixin']._replace_local_links(full_body)
-        full_body = tools.html_sanitize(full_body, sanitize_attributes=True, sanitize_style=True)
 
         for valid_email in valid_emails:
             mail_values = {