Mail Sender Rewriting Scheme (SRS) Library
Libsrs2 implements the Sender Rewriting Scheme (SRS), a part of the SPF/SRS protocol pair. Libsrs2 has been written from an entirely clean codebase with compliance, speed and versatility in mind. It is platform independent and has no external dependencies. It is thread-safe and heap-safe, and is suitable for large scale applications and embedded systems and can operate without many standard system facilities.