diff --git a/addons/mail/models/mail_template.py b/addons/mail/models/mail_template.py
index e0e16eeef7c..65ffe08e1e1 100644
--- a/addons/mail/models/mail_template.py
+++ b/addons/mail/models/mail_template.py
@@ -300,7 +300,7 @@ class MailTemplate(models.Model):
 
         def _process_link(url):
             new_url = urls.url_parse(url)
-            if new_url.scheme and new_url.netloc:
+            if new_url.scheme and (new_url.netloc or new_url.scheme == 'mailto'):
                 return url
             return new_url.replace(scheme=base.scheme, netloc=base.netloc).to_url()