diff --git a/docs/api.md b/docs/api.md
index fa57e37..d996462 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -104,7 +104,7 @@ This applies as possible return type of all of the hooks below.
   in order to use the `RemoveRecipient` manipulation.
 - `can_quarantine` (default: False)
 
-  in order to use the `Quarantine` response in `hook_on_end_of_message`.
+  in order to use the `Quarantine` manipulation.
 
 
 ## `Command`s
@@ -142,6 +142,7 @@ This applies as possible return type of all of the hooks below.
       - `ChangeHeader`
     - `ReplaceBodyChunk`
     - `ChangeMailFrom`
+    - `Quarantine`
   - *AbstractResponse*
     - *AbstractVerdict*
       - *BaseVerdictNoData*
@@ -152,7 +153,6 @@ This applies as possible return type of all of the hooks below.
       - *BaseReplyWithCode*
         - `RejectWithCode`
         - `TempFailWithCode`
-      - `Quarantine`
     - *BaseResponseNoData*
       - `Continue`
       - `SkipToNextStage`
diff --git a/src/purepythonmilter/protocol/responses.py b/src/purepythonmilter/protocol/responses.py
index d8e212f..78d623b 100644
--- a/src/purepythonmilter/protocol/responses.py
+++ b/src/purepythonmilter/protocol/responses.py
@@ -226,7 +226,7 @@ class DiscardMessage(BaseVerdictNoData):
 
 
 @attrs.define(auto_attribs=False, kw_only=True)
-class Quarantine(AbstractVerdict):
+class Quarantine(AbstractManipulation):
     """
     Put the message in the hold queue. Only valid at End of Message stage.
     The reason text is ignored by Postfix at the time of writing.
@@ -234,7 +234,10 @@ class Quarantine(AbstractVerdict):
     """
 
     response_char: ClassVar[bytes] = b"q"  # SMFIR_QUARANTINE
-    reason: str
+    reason: str = attrs.field()
+
+    def encode(self) -> Payload:
+        return Payload(self.response_char + self.reason.encode() + b"\x00")
 
 
 @attrs.define(auto_attribs=False, kw_only=True)