A reprint is available here: Magic Quadrant for Secure Email Gateways.
Secure email gateways (SEGs) provide basic message transfer agent functions; inbound filtering of spam, phishing, malicious and marketing emails; and outbound data loss prevention (DLP) and email encryption.
The SEG market is mature. The penetration rate of commercial SEG solutions is close to 100% of enterprises. The market growth rate has leveled off to low-single digits, and there are no significant market entrants or acquisitions — all classic signs of a mature market. Despite the market maturity, companies can't do without SEG solutions. Global spam and phishing will remain a persistent nuisance for the foreseeable future, and data protection concerns will fuel the growth in outbound controls.