Hi Robert, > I am trying to compile JNOS 2.0b version ... The error below is fixed for later versions. You should be compiling version 2.0c4 anyways, since 2.0b is *old*. 2.0c4 is readily available on my webpage : http://www.langelaar.net/projects/jnos2 > pop3cli.c:141: `auth_ok' undeclared (first use in this function) Maiko