From d0e2886f9829a1de74a46d31a93576778cf8c873 Mon Sep 17 00:00:00 2001
From: Ralf Becker <ralfbecker@outdoor-training.de>
Date: Fri, 19 Dec 2014 17:58:44 +0000
Subject: [PATCH] fix fatal error for Horde_Mime < 2.5.0

---
 phpgwapi/inc/class.egw_mailer.inc.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/phpgwapi/inc/class.egw_mailer.inc.php b/phpgwapi/inc/class.egw_mailer.inc.php
index 309aa498be..fb899cbe65 100644
--- a/phpgwapi/inc/class.egw_mailer.inc.php
+++ b/phpgwapi/inc/class.egw_mailer.inc.php
@@ -409,9 +409,10 @@ class egw_mailer extends Horde_Mime_Mail
 	 */
 	function send()
 	{
-		if (!($message_id = $this->getHeader('Message-ID')))
+		if (!($message_id = $this->getHeader('Message-ID')) &&
+			class_exists('Horde_Mime_Headers_MessageId'))	// since 2.5.0
 		{
-			$message_id = Horde_Mime_Headers_MessageId::create();
+			$message_id = Horde_Mime_Headers_MessageId::create('EGroupware');
 			$this->addHeader('Message-ID', $message_id);
 		}
 		$body_sha1 = null;	// skip sha1, it requires whole mail in memory, which we traing to avoid now