Update swiftmailer.rst

ArchieDoe · javiereguiluz · commit c9adc2f0c7d4 · 2018-04-27T08:49:11.000+02:00
diff --git a/reference/configuration/swiftmailer.rst b/reference/configuration/swiftmailer.rst
@@ -77,6 +77,13 @@ password
 
 The password when using ``smtp`` as the transport.
 
+command
+~~~~~~~~
+
+**type**: ``string``
+
+Command to be executed by ``sendmail`` transport.
+
 host
 ~~~~
 
