diff --git a/test/e2e.py b/test/e2e.py
index f6000b7..cadd852 100644
--- a/test/e2e.py
+++ b/test/e2e.py
@@ -95,6 +95,9 @@ def main() -> int:
         check("bob reads the message", "hello bob" in bob_read, bob_read)
         check("bob sees alice's key", alice_pub in bob_read)
         check("signature verifies", "signature verified" in bob_read)
+        # the reference client now emits its signed reply address by default
+        check("reference client emits the signed reply address",
+              "reply-to: smol://alice@" in bob_read, bob_read)
 
         # --- JS client replies, through the bridge's WebSocket relay
         ws_env = dict(os.environ, GSMOL_TRANSPORT="ws", GSMOL_BRIDGE=f"ws://127.0.0.1:{bridge_port}")
@@ -117,9 +120,15 @@ def main() -> int:
         new_key = re.search(r"new key:     (\S+)", bob_rotated).group(1)
         resolved = run(alice + ["resolve", f"bob@{host}"])
         check("chain confirms the rotation", "a signed chain confirms it" in resolved, resolved)
-        run(alice + ["send", f"bob@{host}", "--subject", "post-rotation", "--body", "still here"])
+        run(alice + ["send", f"bob@{host}", "--subject", "post-rotation", "--body", "still here",
+                     "--anonymous"])
         print(run(bob + ["fetch"]).strip())
-        check("bob reads mail addressed to the new key", "post-rotation" in run(bob + ["list"]))
+        bob_list = run(bob + ["list"])
+        check("bob reads mail addressed to the new key", "post-rotation" in bob_list)
+        # --anonymous omits the reply address; the field list must show none
+        post_read = run(bob + ["read", re.search(r"([0-9a-f]{8})  .*post-rotation",
+                                                 bob_list).group(1)])
+        check("--anonymous omits the reply address", "reply-to:" not in post_read, post_read)
 
         print(f"\n{len(failures)} failure(s)" + (f": {failures}" if failures else ""))
         return 1 if failures else 0