Nginx

Nginx extends beyond HTTP to serve as a mail proxy server and TCP/UDP proxy, handling email protocols like IMAP, POP3, and SMTP, as well as general network traffic. This versatility allows it to manage diverse communication needs within a single, efficient platform. As a proxy, it can authenticate, route, and balance mail or data streams, improving security and performance for networked applications. Its lightweight, event-driven architecture ensures low latency and high concurrency. Developed by Igor Sysoev under the 2-clause BSD license, Nginx is supported commercially by F5, Inc., providing enterprises with comprehensive solutions for proxy services, load balancing, and content delivery in complex IT environments.