add tip about listener priority to mailer.rst

rogamoore · web-flow · commit 19570b8e7aae · 2022-10-11T15:07:22.000+01:00
diff --git a/mailer.rst b/mailer.rst
@@ -1056,6 +1056,14 @@ is sent::
         }
     }
 
+.. tip::
+
+    The ``MessageEvent`` is also used internally. Depending on your use case
+    you might need to set a lower or higher priority for your own listener.
+    For example, when you want to sign the message, make sure to use ``-1``
+    or lower so the body has already been rendered and will not change after
+    signing.
+
 Development & Debugging
 -----------------------
 

Original file line number	Diff line number	Diff line change
`@@ -1056,6 +1056,14 @@ is sent::`
`1056`	`1056`	`}`
`1057`	`1057`	`}`
`1058`	`1058`
	`1059`	`+.. tip::`
	`1060`	`+`
	`1061`	+ The ``MessageEvent`` is also used internally. Depending on your use case
	`1062`	`+ you might need to set a lower or higher priority for your own listener.`
	`1063`	+ For example, when you want to sign the message, make sure to use ``-1``
	`1064`	`+ or lower so the body has already been rendered and will not change after`
	`1065`	`+ signing.`
	`1066`	`+`
`1059`	`1067`	`Development & Debugging`
`1060`	`1068`	`-----------------------`
`1061`	`1069`