Solved

Exchange 2003 on SBS 2003 - Stopping 3rd Party Spam Filtering - Restoring Inbound SMTP

Posted on 2013-02-05
4
22 Views
Last Modified: 2016-07-01
Hello,

An Exchange server (Exchange 2003 on SBS 2003) that I administer will be discontinuing 3rd Party Spam Filtering (Like GFI, Postini).

In my tests of changing the MX record, I have not been successful in getting inbound email to be restored, to come through. Last year, before using a 3rd party spam filter inbound mail worked swell.

MX was:
10 abccompany.com.pri-mx.smtproutes.com     (1/2hour - for testing)

MX for testing:
10 mail.abccompany.com     (1/2hour - for testing)

So when I remove "abccompany.com.pri-mx.smtproutes.com" no mail flows through Exchange, all users are affected.
When "abccompany.com.pri-mx.smtproutes.com" is in place mail flows fine.

mail.abccompany.com resolves correctly to the static IP for the router and TCP Port 25 forwards from the router to Exchange 2003 on SBS 2003 IP o.k. Port 25 is open on the Windows firewall.

My thought is that there is something in Exchange impeding the inbound mail flow.
The only settings I am aware of affecting the 3rd party spam filtering are:
1. SMTP Connector, Access, Connection and Relay, allowing *.smtproutes.com

Any thoughts?

Sean
0
Comment
Question by:SeanRoss
  • 2
4 Comments
 
LVL 76

Accepted Solution

by:
Alan Hardisty earned 500 total points
ID: 38857776
Check the setting on your Default SMTP Virtual Server> Access Tab> Connection Control Button - make sure that it is set to All Except The List Below.  When using a 3rd party Spam Filtering Service, only specific IP's will be configured to allow just the spam filtering providers mail servers to connect.

Alan
0
 
LVL 76

Expert Comment

by:Alan Hardisty
ID: 41684728
My comment https:#a38857776 should have happily resolved the problem.

Alan
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

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

Find out what you should include to make the best professional email signature for your organization.
How to resolve IMCEAEX NDRs in Exchange or Exchange Online related to invalid X500 addresses.
This video Micro Tutorial explains how to clone a hard drive using a commercial software product for Windows systems called Casper from Future Systems Solutions (FSS). Cloning makes an exact, complete copy of one hard disk drive (HDD) onto another d…
Windows 8 comes with a dramatically different user interface known as Metro. Notably missing from the new interface is a Start button and Start Menu. Many users do not like it, much preferring the interface of earlier versions — Windows 7, Windows X…

820 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