A lack of knowledge and awareness about how to use Linux mail servers could be contributing to the disproportionately large number of Linux machines being exploited to send spam, according to new Symantec Hosted Services research.
The firm's latest monthly MessageLabs Intelligence Report found that Linux-based computers are five times more likely to send spam than Windows PCs.
Mat Nisbet, a malware data analyst at Symantec Hosted Services, explained in a blog post yesterday that he decided to dig deeper into the potential causes.
"On investigating the originating IPs of a random selection of spam from Linux, I found that in most cases it came from a machine running an open-source mail transfer agent, such as Postfix or SendMail, that had been left open," he said.
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