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diff --git a/Postman/Postman-Connectivity-Test/registered-domain-libs-master/PHP/regDomain.class.php b/Postman/Postman-Connectivity-Test/registered-domain-libs-master/PHP/regDomain.class.php
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+<?php
+
+/*
+ * Calculate the effective registered domain of a fully qualified domain name.
+ *
+ * <@LICENSE>
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to you under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * </@LICENSE>
+ *
+ * Florian Sager, 25.07.2008, sager@agitos.de, http://www.agitos.de
+ */
+
+/*
+ * Remove subdomains from a signing domain to get the registered domain.
+ *
+ * dkim-reputation.org blocks signing domains on the level of registered domains
+ * to rate senders who use e.g. a.spamdomain.tld, b.spamdomain.tld, ... under
+ * the most common identifier - the registered domain - finally.
+ *
+ * This function returns NULL if $signingDomain is TLD itself
+ * 
+ * $signingDomain has to be provided lowercase (!)
+ */
+
+class regDomain {
+	/* tld tree */
+	protected $tldTree = array();
+
+	/* main function */
+	public function getRegisteredDomain($signingDomain, $fallback = TRUE) {
+		$signingDomainParts = explode('.', $signingDomain);
+
+		$result = $this->findRegisteredDomain($signingDomainParts, $this->tldTree);
+
+		if ($result===NULL || $result=="") {
+			// this is an invalid domain name
+			return NULL;
+		}
+
+		// assure there is at least 1 TLD in the stripped signing domain
+		if (!strpos($result, '.')) {
+			if ($fallback===FALSE) {
+				return NULL;
+			}
+			$cnt = count($signingDomainParts);
+			if ($cnt==1 || $signingDomainParts[$cnt-2]=="") return NULL;
+			if (!$this->validDomainPart($signingDomainParts[$cnt-2]) || !$this->validDomainPart($signingDomainParts[$cnt-1])) return NULL;
+			return $signingDomainParts[$cnt-2].'.'.$signingDomainParts[$cnt-1];
+		}
+		return $result;
+	}
+
+	/* validate parts */
+	public function validDomainPart($domPart) {
+		// see http://www.register.com/domain-extension-rules.rcmx
+		$len = strlen($domPart);
+
+		// not more than 63 characters
+		if ($len>63) return FALSE;
+
+		// not less than 1 characters --> there are TLD-specific rules that could be considered additionally
+		if ($len<1) return FALSE;
+
+		// Use only letters, numbers, or hyphen ("-")
+		// not beginning or ending with a hypen (this is TLD specific, be aware!)
+		if (!preg_match("/^([a-z0-9])(([a-z0-9-])*([a-z0-9]))*$/", $domPart)) return FALSE;
+
+		return TRUE;
+	}
+
+	/* recursive helper method */
+	public function findRegisteredDomain($remainingSigningDomainParts, &$treeNode) {
+		$sub = array_pop($remainingSigningDomainParts);
+
+		$result = NULL;
+		if (isset($treeNode['!'])) {
+			return '#';
+		}
+
+		if (!$this->validDomainPart($sub)) {
+			return NULL;
+		}
+
+		if (is_array($treeNode) && array_key_exists($sub, $treeNode)) {
+			$result = $this->findRegisteredDomain($remainingSigningDomainParts, $treeNode[$sub]);
+		} else if (is_array($treeNode) && array_key_exists('*', $treeNode)) {
+			$result = $this->findRegisteredDomain($remainingSigningDomainParts, $treeNode['*']);
+		} else {
+			return $sub;
+		}
+
+		// this is a hack 'cause PHP interpretes '' as NULL
+		if ($result == '#') {
+			return $sub;
+		} else if (strlen($result)>0) {
+			return $result.'.'.$sub;
+		}
+		return NULL;
+	}
+
+	/* load tld tree into object */
+	function __construct() {
+		/* include tld tree data */
+		include(dirname(__FILE__) . '/effectiveTLDs.inc.php');
+	}
+
+}