From 7ca4428c160996f82aa130e2aeb288dffdb2764f Mon Sep 17 00:00:00 2001
From: yehudah <yehudah@b8457f37-d9ea-0310-8a92-e5e31aec5664>
Date: Mon, 7 May 2018 11:23:42 +0000
Subject: add support for ptr conflicts on hostname

git-svn-id: https://plugins.svn.wordpress.org/post-smtp/trunk@1869938 b8457f37-d9ea-0310-8a92-e5e31aec5664
---
 Postman/PostmanUtils.php | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/Postman/PostmanUtils.php b/Postman/PostmanUtils.php
index 7eaebe5..8d5cd46 100644
--- a/Postman/PostmanUtils.php
+++ b/Postman/PostmanUtils.php
@@ -452,6 +452,29 @@ class PostmanUtils {
             $result = php_uname('n');
         }
 
+		if ( $result !== 'localhost.localdomain' ) {
+			// get the current result ip
+			$ip = gethostbyname($result);
+
+			// dns query failed
+			if ( $ip == $result ) {
+				return $result;
+			}
+
+			// get the current ip hostname - reverse dns
+			$host = gethostbyaddr($ip);
+
+			// dns query failed
+			if ( $host == $ip ) {
+				return $result;
+			}
+
+			// if hostname is not equal to the result set the ptr
+			if ( $result !== $host ) {
+				$result = $host;
+			}
+		}
+
         return $result;
 	}
 
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