I have gotten a few e-mails like this in my mailbox today(sitename.com and sitename2.com are my domains). I have pop before SMTP on. Is this anything major?

This is the body of the e-mail


The original message was received at Wed, 2 Jul 2003 07:11:49 -0500
from philla.tbsph.com.tw [61.222.6.114]

----- The following addresses had permanent fatal errors -----


----- Transcript of session follows -----
554 5.0.0 MX list for sitename.com. points back to ns1.sitename.com
554 5.3.5 ... Local configuration error


This is the header


Return-Path:
Received: from localhost (localhost)
by sitename2.com (8.10.2/8.10.2) id h62CBnl28543;
Wed, 2 Jul 2003 07:11:49 -0500
Date: Wed, 2 Jul 2003 07:11:49 -0500
From: Mail Delivery Subsystem
Message-Id: <200307021211.h62CBnl28543@ns1.sitename.com>
To: postmaster
To:
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
boundary="h62CBnl28543.1057147909/ns1.sitename.com"
Subject: Returned mail: see transcript for details
Auto-Submitted: auto-generated (failure)
X-UIDL: C-;!!=