--- /dev/null
+From CALLER@test.ex Tue Mar 02 09:44:33 1999
+Return-path: <CALLER@test.ex>
+Envelope-to: userz@test.ex
+Delivery-date: Tue, 2 Mar 1999 09:44:33 +0000
+Received: from CALLER by the.local.host.name with local (Exim x.yz)
+ (envelope-from <CALLER@test.ex>)
+ id 10HmbA-0005vi-00
+ for userz@test.ex; Tue, 2 Mar 1999 09:44:33 +0000
+Message-Id: <E10HmbA-0005vi-00@the.local.host.name>
+From: CALLER_NAME <CALLER@test.ex>
+Date: Tue, 2 Mar 1999 09:44:33 +0000
+
+Second test message, no prefix.
+
+07-Mar-2000 12:21:52 +0100,ddd;000000000000-00000000\r
+Return-path: <CALLER@test.ex>\r
+Envelope-to: mbx_userz@test.ex\r
+Delivery-date: Tue, 2 Mar 1999 09:44:33 +0000\r
+Received: from CALLER by the.local.host.name with local (Exim x.yz)\r
+ (envelope-from <CALLER@test.ex>)\r
+ id 10HmbB-0005vi-00\r
+ for mbx_userz@test.ex; Tue, 2 Mar 1999 09:44:33 +0000\r
+Message-Id: <E10HmbB-0005vi-00@the.local.host.name>\r
+From: CALLER_NAME <CALLER@test.ex>\r
+Date: Tue, 2 Mar 1999 09:44:33 +0000\r
+\r
+Test message with mbx_ prefix\r
+From CALLER@test.ex Tue Mar 02 09:44:33 1999
+Return-path: <CALLER@test.ex>
+Envelope-to: userz@test.ex
+Delivery-date: Tue, 2 Mar 1999 09:44:33 +0000
+Received: from CALLER by the.local.host.name with local (Exim x.yz)
+ (envelope-from <CALLER@test.ex>)
+ id 10HmbC-0005vi-00
+ for userz@test.ex; Tue, 2 Mar 1999 09:44:33 +0000
+Message-Id: <E10HmbC-0005vi-00@the.local.host.name>
+From: CALLER_NAME <CALLER@test.ex>
+Date: Tue, 2 Mar 1999 09:44:33 +0000
+
+Second test message, no prefix.
+