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altoHiway Knowledge Base / Email / SMTP ID=54
Securing Exchange 5.5
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Configuring Microsoft Exchange 5.5 to prevent it relaying unwanted email (spam)
The following steps should assist you in configuring your Exchange server to not relay spam/junk email.
- Install Service Pack 3 or 4
- On the Internet Mail Service configuration in Exchange Administrator
- Select the Routing Tab
- Select ‘re-route incoming mail’ and add routing Yourdomain.co.uk route to
- Click Routing Restrictions
- Tick Hosts and Clients with these IP Addresses
- Do NOT add any IP addresses into the list
- Click OK and OK again back to configuration
- Select Connections Tab
- Select "Only from hosts using 'authentication'"
- Press the ‘specify by host’... button
- Press Add and type in IP Address: 195.12.1.0 Mask: 255.255.255.0
- Select option ‘Accept connection from this host’
- Repeat steps 11-12 for IP Address 195.12.4.0 Mask: 255.255.255.0 plus your own internal network addresses of course to allow clients to send mail. Additionally add the range 213.83.66.0 Mask: 255.255.255.0 if utilising mailcontroller.
Voila, server secured
*Please note: - Should you add any service pack to NT or Exchange, it is advisable to re-implement these settings
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| Last Updated: Fri 28 May 04 |
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