Solved

Private IP address Blacklisted for Email

Posted on 2011-02-18
10
395 Views
Last Modified: 2012-06-21
Greetings,
        I seem to be having a problem with Blacklist and my Exchange Server.  It seems that my emails being sent out to certain domains are being blocked because the Private IP of the exchange server is blacklisted.  Here is my setup

Exchange 2003 server with a Private IP of 190.50.80.50
SonicWall NSA2400 Firewall with a Public IP of 173.25.38.xx

Message from Email Bounce Back

554 Service unavailable; Client host [mail.company.com] blocked using Barracuda Reputation; http://bbl.barracudacentral.com/q.cgi?ip=190.50.80.50

I have searched for an answer now for some time, but have no luck.  Any help would be appreciated.
0
Comment
Question by:jdesesa-ITW
  • 3
  • 2
  • 2
  • +2
10 Comments
 
LVL 3

Expert Comment

by:pitchford
Comment Utility
190.50.80.50 is not a private address. That is an address from Argentina; it's likly someone is spamming from this address and you've used this address inside your network.

Refer to this site for private address ranges: http://en.wikipedia.org/wiki/Private_network
0
 
LVL 32

Expert Comment

by:aleghart
Comment Utility
190.50.80.50 is not a private IP address.

It's public, and belongs in the LACNIC range (Latin America - Caribbean).

Telefonica de Argentina (telefonica.com)



What makes you think that you can use that as a private IP address?
0
 
LVL 32

Expert Comment

by:aleghart
Comment Utility
^ pichford beat me to it.

There are thousands of spam reports against that IP address.  Most likely it is from any number of infected computers using that ISP's block of addresses.

Regardless, you should stick to the acceptable private IP addresses.  Not only will it avoid blacklist matches, but also avoid problems with flagging as a spoofed address.
0
 
LVL 3

Expert Comment

by:pitchford
Comment Utility
Better type faster. =)

Technically speaking, you can use you address in the world you want; but if you attempted to access any services from that IP range it would fail. You could set your private address as 64.156.132.0/24; but you wouldn't be able to access Experts Exchange because it would look to your inside network. I only use private addresses internally; even in my private WAN network.

That's the curren IP address of experts-exchange.com by the way.

Best of luck chaps!
0
Do email signature updates give you a headache?

Constantly trying to correctly format email signatures? Spending all of your time at every user’s desk to make updates? Want high-quality HTML signatures on all devices, including on mobiles and Macs? Then, let Exclaimer solve all your email signature problems today!

 
LVL 76

Accepted Solution

by:
Alan Hardisty earned 250 total points
Comment Utility
Please have a read of my article about problems sending mail to one or more external domains:

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/A_2427-Problems-sending-mail-to-one-or-more-external-domains.html
0
 

Author Comment

by:jdesesa-ITW
Comment Utility
I understand what everyone is saying about using private IP addresses inside my LAN, however this was already in place when I took over from the previous IT manager.  If there is no other way, then I will have to change the internal network to a more appropriate private ip range.  I was hoping that there was a way of making the email look like it was coming from my Router External Address instead of the "Private" IP address of the server
0
 
LVL 76

Expert Comment

by:Alan Hardisty
Comment Utility
Email originates from a server not a router, so whatever you try to do to disguise this will be in vain because the headers will always show the internal server IP of the sending server on your network and there is nothing you can do about it.
0
 
LVL 3

Expert Comment

by:pitchford
Comment Utility
You can always change your IP address. Our public IP was blacklisted once. I just changed the address by 1 number.. wasn't listed anymore. You can try that as a temp fix but you need to work on that addressing scheme. Best of luck.
0
 
LVL 74

Expert Comment

by:Glen Knight
Comment Utility
This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.
0

Featured Post

What Is Threat Intelligence?

Threat intelligence is often discussed, but rarely understood. Starting with a precise definition, along with clear business goals, is essential.

Join & Write a Comment

Utilizing an array to gracefully append to a list of EmailAddresses
Marketers need statistics and metrics like everybody else needs oxygen. In this article we explain how to enable marketing campaign statistics for Microsoft Exchange mail.
In this video we show how to create a mailbox database in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Servers >> Data…
The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…

728 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

9 Experts available now in Live!

Get 1:1 Help Now