From 3994985eb2ef584f0abcec0e70016d2ff618a6c0 Mon Sep 17 00:00:00 2001
From: azumakuniyuki <azumakuniyuki@gmail.com>
Date: Sat, 3 Oct 2020 21:27:04 +0900
Subject: [PATCH] Update comment about Null MX sisimai/set-of-emails#4

---
 lib/Sisimai/SMTP/Status.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Sisimai/SMTP/Status.pm b/lib/Sisimai/SMTP/Status.pm
index 3337657f2..e6505b274 100644
--- a/lib/Sisimai/SMTP/Status.pm
+++ b/lib/Sisimai/SMTP/Status.pm
@@ -643,7 +643,7 @@ use constant StandardCode => {
     '5.7.24' => 'securityerror',# SPF validation error
     '5.7.25' => 'blocked',      # Reverse DNS validation failed
     '5.7.26' => 'securityerror',# Multiple authentication checks failed
-    '5.7.27' => 'notaccept',    # MX of Destination host is null MX
+    '5.7.27' => 'notaccept',    # MX resource record of a destination host is Null MX: RFC7505
 };
 
 use constant InternalCode => {