diff --git a/filtermail/src/inbound.rs b/filtermail/src/inbound.rs
index 9af1f1e8..b2921b7d 100644
--- a/filtermail/src/inbound.rs
+++ b/filtermail/src/inbound.rs
@@ -101,7 +101,13 @@ impl SmtpHandler for IncomingBeforeQueueHandler {
         envelope.rcpt_to = envelope
             .rcpt_to
             .iter()
-            .filter(|s| !self.config.is_disabled(s))
+            .filter(|s| {
+                let disabled = self.config.is_disabled(s);
+                if disabled {
+                    log::warn!("Disabled recipient: {s}; removing from RCPT TO");
+                }
+                !disabled
+            })
             .cloned()
             .collect();
 
diff --git a/filtermail/src/outbound.rs b/filtermail/src/outbound.rs
index 5db04e05..5c60808b 100644
--- a/filtermail/src/outbound.rs
+++ b/filtermail/src/outbound.rs
@@ -81,7 +81,13 @@ impl SmtpHandler for OutgoingBeforeQueueHandler {
         envelope.rcpt_to = envelope
             .rcpt_to
             .iter()
-            .filter(|s| !self.config.is_disabled(s))
+            .filter(|s| {
+                let disabled = self.config.is_disabled(s);
+                if disabled {
+                    log::warn!("Disabled recipient: {s}; removing from RCPT TO");
+                }
+                !disabled
+            })
             .cloned()
             .collect();