diff --git a/web/docs/Senders.mdx b/web/docs/Senders.mdx
index 14bfc4fab8..6df1075789 100644
--- a/web/docs/Senders.mdx
+++ b/web/docs/Senders.mdx
@@ -144,6 +144,9 @@ Emails are sent with an `ACTION_SEND_MULTIPLE` intent. This means that the follo
 
 You can implement your own `ReportSender` and configure ACRA to use that instead of or in addition to other senders.
 
+:::Tip
+Throwing a `ReportSenderException` from `YourCustomSender.send()` notifies ACRA of a failed delivery, and might trigger a retry (see [RetryPolicy](https://www.acra.ch/javadoc/latest/acra/org.acra.config/-core-configuration/retry-policy-class.html)).
+
 <AndroidCode>
 
 ```kotlin