There are no good, maintained C libraries to handle SPF in UNIX.

There is a good Python one.

So, let's port it!

The current status is:

it's ready for testing, but probably not for production use, until it's tested some more.

- It works like PySPF ( no divergences in over 350 tests).

- It's compliant: It passes 100% of the official SPF Test Suite (with two warnings).

- It's memory leak free. Ok, not really, but it has no leaks on any of the over 400 tests it runs. There are a couple of places where it may leak, though.