Corporate security vendor WatchGuard Technologies has extended the content security capabilities of its XCS line of appliances to add encryption and anti-spam functionality.
The WatchGuard XCS add-in for Outlook provides the ability to flag false negatives or false positives by marking delivered mail as 'spam' or 'not spam'.
The customer's list of trusted or blocked senders can thus be updated to more accurately reflect their status, the firm said.
The XCS line has also been updated to include SecureMail Email Encryption, allowing users to encrypt particularly sensitive outbound messages without the need to invest in a local encryption server or additional desktop software, according to WatchGuard.
Messages can be unencrypted at the other end via a simple authentication process, while the feature itself can be branded by individual organisations.
"Email continues to be a significant threat vector for businesses around the world," said Tim Helming, director of product management at WatchGuard.
"These latest enhancements to WatchGuard's XCS security appliances provide even better spam blocking, and the new encryption features give peace of mind to businesses that want to ensure that their sensitive data is handled securely."
Security experts are generally divided over the threat to businesses posed by spam. Unwanted mail is still a significant headache for IT managers, but Cisco has predicted that the tide is turning against the spammers, after significant reductions in volume following the closure of affiliate sites.
The WatchGuard updates will apply to the XCS 170, 370 and 570 series built for small and medium sized firms with up to 1,000 users, and the WatchGuard XCS 770, 970 and 1170 appliances for mid-range and enterprise customers with more than 10,000 users.
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