weird NDR

[lingk]

the server is window 2003 standard with exchange server 2003

someone sent out an e-mail and this is NDR that pops back. the thing that seams odd to me is. the IP address it lists. it's not in the range that i was give for my ISP. I did an mx look up on my domain and thats giving the right IP.

when i check the site it's say our range is marked as spam. but I'm unsure because the IP it gives isn't our MX record IP.

any ideas?

There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.

<mail.fischerus.com #5.5.0 smtp;553 Dynamic pool 12.104.180.101. <http://unblock.secureserver.net/?ip=12.104.180.*>>

[olocin]

Are you saying your IP block is identified as spam? Can you post the NDR, so we can determine the error you recieved.

[olocin]

Are you saying your IP block is identified as spam? Can you post the NDR, so we can determine the error you recieved.

Sorry i did not the the error, is this your email server? "mail.fischerus.com"

There's a problem on your MX record see below from checkDNS

CheckDNS.NET is asking root servers about authoritative NS for domain

Got DNS list for 'fischerus.com' from m.gtld-servers.net

Found NS record: ns7.worldnic.com[205.178.190.4], was resolved to IP address by m.gtld-servers.net

Found NS record: ns8.worldnic.com[205.178.189.4], was resolved to IP address by m.gtld-servers.net

Domain has 2 DNS server(s)

CheckDNS.NET is verifying if NS are alive

DNS server ns7.worldnic.com[205.178.190.4] is alive and authoritative for domain fischerus.com

DNS server ns8.worldnic.com[205.178.189.4] is alive and authoritative for domain fischerus.com

2 server(s) are alive

CheckDNS.NET checks if all NS have the same version

All 2 your servers have the same zone version 2007052401

CheckDNS.NET verifies www servers

Checking HTTP server www.fischerus.com [12.104.180.51]

HTTP server www.fischerus.com[12.104.180.51] answers on port 80

Received: HTTP/1.1 200 OK (Server: Microsoft-IIS/6.0) . DESIGN IN MOTION - fischer Automotive Systems.

CheckDNS.NET tests mail-servers

Domain fischerus.com has only one mail-server

Checking mail server (PRI=10) MAIL.fischerus.com [12.104.180.50]

Mail server MAIL.fischerus.com[12.104.180.50] answers on port 25

<<< 220 mail.fischerus.com Microsoft ESMTP MAIL Service, Version: 6.0.3790.1830 ready at Thu, 21 Jun 2007 05:40:15 -0400

>>> HELO www.checkdns.net

<<< 250 mail.fischerus.com Hello [195.60.98.252]

>>> MAIL FROM: <dnscheck@uniplace.com>

<<< 250 2.1.0 dnscheck@uniplace.com....Sender OK

>>> RCPT TO: <postmaster@fischerus.com>

<<< 550 5.1.1 User unknown

>>> RCPT TO: <root@fischerus.com>

<<< 550 5.1.1 User unknown

>>> RCPT TO: <info@fischerus.com>

<<< 550 5.1.1 User unknown

>>> RCPT TO: <webmaster@fischerus.com>

<<< 550 5.1.1 User unknown

Probably mail server does not accept mail for fischerus.com (received status 550)

Some of your MX do not work properly

CheckDNS Quick Check Engine

Enter the domain name here