diff --git a/gnu/packages/mail.scm b/gnu/packages/mail.scm
index 5ffb5b6cd197afcd7db31db042a5386c90756564..c31a1410091be1f1b9e85f22639368d45cfd2b6c 100644
--- a/gnu/packages/mail.scm
+++ b/gnu/packages/mail.scm
@@ -2014,7 +2014,7 @@ (define-public dkimproxy
 proxy for signing outgoing email, and an inbound proxy for verifying signatures
 of incoming email.  With Postfix, the proxies can operate as either
 @code{Before-Queue} or @code{After-Queue} content filters.")
-    (license gpl3+)))
+    (license gpl2+)))
 
 (define-public mb2md
   (package