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| Document ID: | 466 |
|---|---|
| Subject: | How to filter outbound messages for spam when used as a firewall for MS Exchange or any other SMTP server |
| Creation date: | 4/23/09 4:34 PM |
| Last modified on: | 4/23/09 5:55 PM |
How to filter out-bound emails for junk/spam
Outbound messages are filtered when you use Xeams as your out-bound SMTP server. If Xeams is the only server on your network filtering out-bound messages is easy. However, if you have other servers, such as Microsoft Exchange, the network configuration may become tricky.
The following section lists different network designs that are typically used in companies.
Using Xeams as a firewall for a primary email server running on the same machine
Assumptions:- Xeams is running on the same that is used by your primary email server, which could be any server that supports SMTP, for example MS Exchange.
- Your primary server has a feature to forward all out-bound message to a one machine. The feature is called Smart Host in MS Exchange.
- You are using SMTP Proxy Server in Xeams to process incoming emails.
- The IP address of your machine is 192.168.1.5
- Create a new IP address for your machine - Since Xeams and your primary email server are running on the same machine, you need to create a new IP address for the machine. This is required because two processes cannot listen on TCP/IP port 25 on the same IP address. Assume the second IP address is 192.168.1.6
- Configure Xeams SMTP server to listen on port 25 on the second IP. Log in to the Admin Console and click Configuration link for the SMTP server.
- Check the Enable box, set the port to 25, and select 192.168.1.6 from the Bind To pick list.
- Add 192.168.1.5 (IP address of your primary server) to the Open Relay list, under the Relaying tab.
