Add warning about custom SES headers

KDederichs · web-flow · commit cb44ce90a137 · 2024-01-24T23:24:45.000+01:00
diff --git a/mailer.rst b/mailer.rst
@@ -198,6 +198,11 @@ OhMySMTP             ohmysmtp+smtp://API_TOKEN@default                    n/a
 
         The ``ping_threshold`` option for ``ses-smtp`` was introduced in Symfony 5.4.
 
+.. caution::
+
+    If you need to send custom headers to receive them later via webhook using the `Amazon SES` transport
+    be sure to use the ``ses+https`` provider since custom headers are not transmited otherwise. 
+
 .. note::
 
     When using SMTP, the default timeout for sending a message before throwing an
