[dev] Use of uninitialized string (PostMaster.pl)

cat test1.txt | ./PostMaster.pl Use of uninitialized value in string eq at /otrs/Kernel/System/Ticket/Article.pm line 1387. test1.txt contains: --- From: joho@webbplatsen.se To: foo@webbplatsen.se Subject: This is a test And some text --- I'm trying to figure out why the autoresponse messages are sent using the wrong e-mail address (OTRS uses the QUEUE-name followed by @myservername.webbplatsen.net).. The message is placed in the correct queue. [OTRS 1.3.1] -joho