diff --git a/postfix-2.11.1.tar.gz.asc b/postfix-2.11.1.tar.gz.asc
new file mode 100644
index 0000000..49b7601
--- /dev/null
+++ b/postfix-2.11.1.tar.gz.asc
@@ -0,0 +1,11 @@
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+Version: GnuPG v1.4.12 (FreeBSD)
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+=nvSC
+-----END PGP SIGNATURE-----
diff --git a/postfix-2.11.1.tar.gz.sig b/postfix-2.11.1.tar.gz.sig
deleted file mode 100644
index 1dac2cf..0000000
Binary files a/postfix-2.11.1.tar.gz.sig and /dev/null differ
diff --git a/postfix.changes b/postfix.changes
index e2675fd..649b9a7 100644
--- a/postfix.changes
+++ b/postfix.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sun Sep 14 16:50:57 UTC 2014 - andreas.stieger@gmx.de
+
+- switch from md5 based signature to one using the SHA-512 digest
+  algorithm supplied by maintainer on ML to pass source_validator
+
 -------------------------------------------------------------------
 Sat Sep 13 21:44:41 UTC 2014 - andreas.stieger@gmx.de
 
diff --git a/postfix.spec b/postfix.spec
index 3a0fc25..1ca3555 100644
--- a/postfix.spec
+++ b/postfix.spec
@@ -25,7 +25,7 @@ Release:        0
 Url:            http://www.postfix.org/
 
 Source:         http://www.artfiles.org/postfix.org/postfix-release/official/postfix-%{version}.tar.gz
-Source1:        http://www.artfiles.org/postfix.org/postfix-release/official/postfix-%{version}.tar.gz.sig
+Source1:        postfix-%{version}.tar.gz.asc
 Source2:        %{name}-SuSE.tar.gz
 Source3:        %{name}-mysql.tar.bz2
 Source4:        %{name}.keyring