That's a neat POP3 library, any thoughts about IMAP access too?

 One minor quibble: Your sample code contains a couple of exploitable buffer overflows.

 I guess this isn't a huge problem as the code is clearly sample code, and isn't installed setuid() or anything silly like that. I just have a reflex action of trying to persuade people to always be more careful...

int main(int argc,char** argv){
        int mysock;
        char myservername[64];
        char username[64];
        char password[64];

 // Time passes ...

 strcpy(myservername,argv[1]);
strcpy(username,argv[2]);
strcpy(password,argv[3]);

 // Thorin sits down and starts singing about gold ..