The volume of mobile spam messages touting free gift cards sharply fell after the U.S. Federal Trade Commission (FTC) filed complaints in early March against eight companies, according to antispam vendor Cloudmark.

The majority of email and Web gateways, firewalls, remote access servers, UTM (united threat management) systems and other security appliances have serious vulnerabilities, according to a security researcher who analyzed products from multiple vendors.

Twitter has implemented DMARC, a standard for preventing email spoofing, in order to make it harder for attackers to send phishing emails that appear to come from twitter.com addresses.

For the first time, a major botnet take-down has included direct victim notification that warns users their PCs are infected and shows them how to scrub clean their machines.

A new Trojan program that displays rogue advertisements during browsing sessions uses a DNS-based email validation protocol called the Sender Policy Framework (SPF) in order to receive instructions from attackers without being detected, according to security researchers from Symantec.

Want to send a message directly to Facebook founder Mark Zuckerberg? It might cost you $100, if you don't want it to wind up in his spam folder.

Skype has been battling wily adversaries who are abusing the Internet calling application to direct people to scam websites, but the Microsoft-owned service says the sham calls are decreasing.

A U.S. district judge has approved a request for class action in a lawsuit against pizza maker Papa John's International for allegedly sending hundreds of thousands of text spam messages.

PDF files are one of the most common, and most trusted document formats out there. However, that trust, combined with the cross-platform use of PDFs makes the Adobe file format one of the most targeted and exploited by malicious attacks as well.

Most of us don't like paying for antivirus (AV) software, but at least home users can rely on one of the free options, such as Microsoft Security Essentials, avast!, or AVG Free.

Security researchers have shown that carefully crafted text messages sent to cell phones via short message service (SMS) can cause them to shutdown without the knowledge of the owner.