?
Solved

Blacklist & block list for emails/domian/IP

Posted on 2016-07-29
4
Medium Priority
?
38 Views
Last Modified: 2016-08-22
I run an IT company, we are busy : We support Many companies and run a lot of projects each year. We support many exchange server.
We are a full control company: Sale of Servers to MSP supporting the companies.

I have noticed that all the companies who were on exchange 2003 etc (older platform) did not have any issue and never got black/block listed.
As we move along: We use SSL Certificates from Godaddy, 2013/2010 Exchange : 4443 Port forwarding to Exchange, Properly configured exchange and also Barracuda as a SPAM filtering service for all clients as well.
We go to the point that Port 25 is blocked on the firewall.
Black/Block lists are taking toll on our support.

Is there something we are missing?
0
Comment
Question by:Member_2_7969992
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 5

Assisted Solution

by:Eric C
Eric C earned 500 total points (awarded by participants)
ID: 41735042
are you sure it has anything to do with the version of Exchange?

have you set up DKIM?
SPF records?
is DNS set up properly?
are you using a smarthost? What IP are the outgoing messages using? have you checked mxtoolbox.com (for example) and if the IP is on a blacklist, does it tell you why?
is rDNS properly set up?
0
 
LVL 30

Assisted Solution

by:pgm554
pgm554 earned 500 total points (awarded by participants)
ID: 41735063
Email is not the only source of why you would get black listed.

I've had ip's blacklisted because of malware backdoors using various ports.
0
 
LVL 63

Accepted Solution

by:
Simon Butler (Sembee) earned 1000 total points (awarded by participants)
ID: 41735931
If it was the version of Exchange, then it would have been resolved by now.
Furthermore if an Exchange server was compromised you tend to notice as it fills the queues.

As already pointed out, the most common reason for blacklisting is malware. Block port 25 outbound for everything but the Exchange server, or get a smart hosting service and have Exchange servers route through that, so the actual IP address isn't an issue.

You need to look at WHY you are being blacklisted - that will give you an idea as to the problem.
1
 
LVL 63

Expert Comment

by:Simon Butler (Sembee)
ID: 41762202
Question has been answered, with no follow up from asker.
0

Featured Post

Moving data to the cloud? Find out if you’re ready

Before moving to the cloud, it is important to carefully define your db needs, plan for the migration & understand prod. environment. This wp explains how to define what you need from a cloud provider, plan for the migration & what putting a cloud solution into practice entails.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In-place Upgrading Dirsync to Azure AD Connect
A list of top three free exchange EDB viewers that helps the user to extract a mailbox from an unmounted .edb file and get a clear preview of all emails & other items with just a single click on mailboxes.
To show how to generate a certificate request 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 >> Certificates…
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…
Suggested Courses

801 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