1 files changed, 4 insertions, 1 deletions

diff --git a/src/mailman_pgp/pgp/wrapper.py b/src/mailman_pgp/pgp/wrapper.py
index fcbec0e..6e8a8f9 100644
--- a/src/mailman_pgp/pgp/wrapper.py
+++ b/src/mailman_pgp/pgp/wrapper.py
@@ -80,7 +80,10 @@ class PGPWrapper():
             yield from self.inline.verify(key)
 
     def verifies(self, key):
-        return all(bool(verification) for verification in self.verify(key))
+        return all(bool(verification) and
+                   all(not sigsubj.signature.is_expired
+                       for sigsubj in verification.good_signatures) for
+                   verification in self.verify(key))
 
     def is_encrypted(self):
         return self.mime.is_encrypted() or self.inline.is_encrypted()