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In properties of &quot;Default SMTP virtual server&quot; go to Delivery tab, click Advanced delivery and you will find checkbox &quot;Perform reverse DNS lookup&quot;. This option is reported to slow down your server and there is another catch, are you sure that all your senders have proper PTR record, for reverse lookup to work correctly?<br />
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HTH<br />
<br />
Toni
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In properties of "Default SMTP virtual server" go to Delivery tab, click Advanced delivery and you will find checkbox "Perform reverse DNS lookup". This option is reported to slow down your server and there is another catch, are you sure that all your senders have proper PTR record, for reverse lookup to work correctly?

HTH

Toni

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This is something that if you can do if you upgrade to Exchange 2007:<br />
<a href="http://www.openspf.org/News/2006-12-14" rel="ugc">http://www.openspf.org/News/2006-12-14</a><br />
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In Exchange it's called SIDF (Sender ID Framework)
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This is something that if you can do if you upgrade to Exchange 2007:
http://www.openspf.org/News/2006-12-14 [http://www.openspf.org/News/2006-12-14]

In Exchange it's called SIDF (Sender ID Framework)

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Forced accept.<br />
<br />
Computer101<br />
EE Admin
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How do i configure my exchange server (SBS2003) to use reverse dns lookup to block incoming mail like other servers do. &nbsp;I'm looking to cut down on junk emial and i know this would help.
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How do i configure my exchange server (SBS2003) to use reverse dns lookup to block incoming mail like other servers do.  I'm looking to cut down on junk emial and i know this would help.

Reverse DNS Lookup

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

Microsoft Forefront, formerly known as Internet Security and Acceleration Server (ISA Server), is a network router, firewall, antivirus program, VPN server and web cache that runs on Windows servers. It includes identity management and protection systems, and discontinued systems for threat management and network protection, along with protection for Sharepoint and Exchange. The scope of discussions includes forward and reverse proxy, application and service publishing, virtual private networks (VPNs), outbound access rules, SSL certificates and network routing within either a single node or an highly-available array pairing.

Microsoft Forefront ISA Server

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.