Email security is broken. Companies are attempting to defend against today’s sophisticated attacks using technology developed to block spam and malware.
In the late 1990s, spam had become a serious problem and propagation of malware by email started to increase. In response, email security software was created. The popular open source spam filtering software, SpamAssassin, was first made available in 2001. It included various detection techniques, such as Bayesian filtering, IP reputation and blocklists. The Secure Email Gateway (SEG), a product category that came into being in the early 2000s, still uses these techniques today.