DomainKey-Status: bad format (blank e-mails)

[FrantišekH]

Just after I upgraded from Plesk v9.2.? to 9.5.2, server started to send to my postmaster (probably directed by /var/qmail/alias/*) blank e-mails. Every about 20 minutes arrives 1-4 e-mails. Why?

Example header (===domain=== is a replacement):

DomainKey-Status: bad format
X-Spam-Checker-Version: SpamAssassin 3.1.9 (2007-02-13) on ===domain===
X-Spam-Level: *****
X-Spam-Status: No, score=5.7 required=7.0 tests=EMPTY_MESSAGE,MISSING_HB_SEP,
MISSING_HEADERS,MISSING_SUBJECT,NO_RELAYS,TO_CC_NONE autolearn=no
version=3.1.9
Received: (qmail 9372 invoked by alias); 17 Sep 2010 04:51:22 +0200
Delivered-To: postmaster@===domain===

I read bunch of topics here, but nothing resolve my problem. I exactly tried mchk, and then replacing qmail by postfix and back too, but it did not help. What now? It is disturbing. Why server sends me that? What part of system sends that?


Thank you in advance.

 

[FrantišekH]

I think that it is a "from=#@[]" problem, as I can see in log. You have solution for Centos v, but I use Centos 4.

How can I fix that?