postfix: Updated (2.5.1 -> 2.5.3)

mail/postfix/postfix.desc

@@ -1,4 +1,3 @@
-
 [COPY] --- SDE-COPYRIGHT-NOTE-BEGIN ---
 [COPY] This copyright note is auto-generated by ./scripts/Create-CopyPatch.
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 [L] OpenSource
 [S] Stable
-[V] 2.5.1
+[V] 2.5.3
 [P] X -----5---9 126.900
 
-[D] 2274562425 postfix-2.5.1.tar.gz ftp://ftp.porcupine.org/mirrors/postfix-release/official/
+[D] 3103672049 postfix-2.5.3.tar.gz ftp://ftp.porcupine.org/mirrors/postfix-release/official/