Index: t3lib/class.t3lib_parsehtml_proc.php
===================================================================
--- t3lib/class.t3lib_parsehtml_proc.php	(révision 7576)
+++ t3lib/class.t3lib_parsehtml_proc.php	(copie de travail)
@@ -691,15 +691,18 @@
 
 			// Split content by the TYPO3 pseudo tag "<link>":
 		$blockSplit = $this->splitIntoBlock('link',$value,1);
+		$siteUrl = $this->siteUrl();
 		foreach($blockSplit as $k => $v)	{
 			$error = '';
 			if ($k%2)	{	// block:
 				$tagCode = t3lib_div::unQuoteFilenames(trim(substr($this->getFirstTag($v),0,-1)),true);
 				$link_param = $tagCode[1];
 				$href = '';
-				$siteUrl = $this->siteUrl();
 					// Parsing the typolink data. This parsing is roughly done like in tslib_content->typolink()
-				if(strstr($link_param,'@'))	{		// mailadr
+				if ($this->isExternalURL($link_param, $siteUrl)) {
+					$href = $link_param;
+					$external = TRUE;
+				} elseif (strstr($link_param,'@')) {		// mailadr
 					$href = 'mailto:'.preg_replace('/^mailto:/i','',$link_param);
 				} elseif (substr($link_param,0,1)=='#') {	// check if anchor
 					$href = $siteUrl.$link_param;
@@ -763,6 +766,28 @@
 	}
 
 	/**
+	 * Checks if URL does not reference any domain in this TYPO3 installation
+	 *
+	 * @param	string		$testString: Test string
+	 * @param	string		$siteUrl: Site URL
+	 * @return	boolean		true, if the url is external
+	 */
+	protected function isExternalURL($testString, $siteUrl) {
+		if (t3lib_div::isValidUrl($testString)) {
+			$host = parse_url($testString, PHP_URL_HOST);
+			list($row) = $GLOBALS['TYPO3_DB']->exec_SELECTgetRows('COUNT(*) AS counter',
+				'sys_domain',
+				'domainName=' . $GLOBALS['TYPO3_DB']->fullQuoteStr($host, 'sys_domain') .
+					t3lib_BEfunc::BEenableFields('sys_domain') . t3lib_BEfunc::BEenableFields('sys_domain'));
+			if ($row['counter'] > 0) {
+				return false;
+			}
+			return substr($testString, 0, strlen($siteUrl)) !== $siteUrl;
+		}
+		return false;
+	}
+
+	/**
 	 * Preserve special tags
 	 *
 	 * @param	string		Content input