Solved

IMF and Connection Filtering

Posted on 2012-04-04
3
447 Views
Last Modified: 2012-04-12
We have an outside spam filtering service for our emails. Our MX records point to the spam filter and then the spam filter points to our mail server.

The outside spam filter wasn't doing a good enough job keeping the spam away. So, I set up the IMF filter on our exchange 2003 server.

The problem is that now we get have one or two email addresses that get blocked by our IMF that shouldn't. Of course, there is no whitelist built in to IMF so to pass false-positives through the IMF I either need a 3rd party tool or I need to use connection filtering.

I've used a few applications for whitelisting like IMFcompanion. It seems like none of them run as a service so as soon as I log out of the server the application closes and the whitelisting functionality stops.

Because of this I decided to try using connection filtering. But the emails are still getting blocked. I'll post the steps that I've taken to configure the connection filtering with hopes that maybe you will catch something that I'm missing.

1) open ESM and go to message delivery > Properties > Connection Filtering > Accept
2) type in the sending server's ip for the blocked emails, 67.50.177.26
3) go to SMTP virtual server > Properties > General > Advanced > Edit
4) I have checked:
                                 Apply Recipient Filter
                                 Apply Sender ID Filter
                                 Apply Intelligent Message Filter
                                 Apply Connection Filter
5) click Ok a few times to finish
6) restart SMTP service.

I've attached an email header from one of the blocked emails that shows the IP address of the blocked email server.
email-header.txt
0
Comment
Question by:David11011
  • 2
3 Comments
 
LVL 17

Expert Comment

by:fgrushevsky
ID: 37808134
The connection filtering would not work for you.

It is designed not to accept connections from unwanted IPs, but all your connections are coming from external spam filtering provider.
You should also check that your firewall is configured to only allow connections from  external spam filtering provider to your Exchange server and there is no possibility for direct connection from any internet host to your Exchange (the spammers don't follow mx records)
0
 
LVL 2

Author Comment

by:David11011
ID: 37812007
Then does anyone happen to know of any good whitelisting utilities I can try out for our IMF on the mailserver?
0
 
LVL 17

Accepted Solution

by:
fgrushevsky earned 500 total points
ID: 37815963
0

Featured Post

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Resolve Outlook connectivity issues after moving mailbox to new Exchange 2016 server
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.
Familiarize people with the process of utilizing SQL Server stored procedures from within Microsoft Access. Microsoft Access is a very powerful client/server development tool. One of the SQL Server objects that you can interact with from within Micr…
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…

758 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

19 Experts available now in Live!

Get 1:1 Help Now