diff --git a/mailer.rst b/mailer.rst
index 60575fed9e9..940931bc329 100644
--- a/mailer.rst
+++ b/mailer.rst
@@ -190,6 +190,26 @@ party provider:
Note that the protocol is *always* HTTPs and cannot be changed.
+Checking your configuration
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+If you have any doubt on your configuration. Or if want to make sure your mail supplier is still working.
+You can do this with the ``mailer:send-email`` command:
+
+.. code-block:: terminal
+
+ $ php bin/console mailer:send-email from=a@symfony.com to=b@symfony.com --subject=Test --body=body
+
+ # No subject/body to send simple test mail
+ $ php bin/console mailer:send-email from=a@symfony.com to=b@symfony.com
+
+The command can also send body from file using ``--body-source`` option:
+
+.. code-block:: terminal
+
+ $ php bin/console mailer:send-email from=a@symfony.com to=b@symfony.com --body-source=file --body=/path/to/file
+
+
High Availability
~~~~~~~~~~~~~~~~~
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