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Freeware SPF
GFI has released a freeware version of its MailEssentials for Exchange/SMTP anti-spam software which supports SPF - the Sender Policy Framework - and also allows incoming email to be checked against third-party DNS blacklists such as and SpamHaus.

SPF automatically tests to see whether email originates from its purported source, thereby authenticating the sender. GFI says that the full version of MailEssentials includes many other anti-spam features, such as the ability to detect directory harvesting by checking that the destination addresses are valid.

Managing handhelds
Altiris is the latest company to dive into the management of networked mobile devices. It says its Handheld Management Suite, at £23 per handheld, includes software delivery, device discovery and asset tracking, and on-device data encryption.

The server end is free and allows admins to lock-down or wipe lost or stolen handhelds, as well as carrying out tasks such as software audits and application rollouts and updates. It is an add-on to the company's asset and IT lifecycle management tools, but can also be used on its own.

Altiris has client software for Windows Mobile, PocketPC and Blackberry devices. However, while it plans to add Palm to its list later this year, it does not support popular Symbian devices such as the SonyEricsson P800 and P900, or Nokia's Communicator series.

Service path security
If you want to ensure security and reliability across your network you need service path security, claims Ipsum Networks. Analysing service paths makes visible how applications and services cross the IP network, and Ipsum says it can be used to spot resource spikes caused by denial of service (DoS) attacks.

The company says it has added service path security to RouteDynamics, its network security package which can monitor route advertisements and map paths to specific devices in the network, thereby correlating path changes to routing updates. Ipsum says this can be used to make mission critical networks more secure, available and resilient.