QUALCOMM* Incorporated distributes freeware Linux/UNIX POP3 software known as Qpopper* in C source form. With no modifications, Qpopper can use Authentication Services for authentication through PAM. Qpopper can also be modified to use Authentication Services for authentication through the AS Client API.
You can obtain Qpopper from the QUALCOMM Web site.
You can install Platform Services on your POP server and use Qpopper to authenticate users using Authentication Services through PAM or through the API.
Directions for modifying Qpopper to use the AS Client API can be found in the ASAM/bin/PlatformServices/PlatformClient/POP directory created by the Platform Services installation process.