O3 Mail System.
O3 is a fast scalable email system that supports SMTP and POP 4. It is
also the reference implementation for POP 4.
As soon as I finish the documentation it will be available for download.
Okay, the documentation isn't finished yet, but you can download
There's a README in the tarball and a makefile.
Download the O3
The POP 4 Home page.
I can be contacted a email@example.com
Please also check sourceforge for project information
related to O3 and POP 4.