courier's authlib daemon fails to start as selinux is preventing access to some files in /var/spool:

type=1400 audit(1219677683.507:30): avc:  denied  { search } for  pid=7714 comm="authdaemond" name="spool" dev=dm-0 ino=369092 scontext=unconfined_u:system_r:courier_authdaemon_t:s0 tcontext=system_u:object_r:var_spool_t:s0 tclass=dir
type=1400 audit(1219677683.515:31): avc:  denied  { write } for  pid=7714 comm="authdaemond" name="authdaemon" dev=dm-0 ino=368811 scontext=unconfined_u:system_r:courier_authdaemon_t:s0 tcontext=system_u:object_r:var_spool_t:s0 tclass=dir
type=1400 audit(1219677683.515:32): avc:  denied  { add_name } for  pid=7714 comm="authdaemond" name="socket.tmp" scontext=unconfined_u:system_r:courier_authdaemon_t:s0 tcontext=system_u:object_r:var_spool_t:s0 tclass=dir
type=1400 audit(1219677683.515:33): avc:  denied  { create } for  pid=7714 comm="authdaemond" name="socket.tmp" scontext=unconfined_u:system_r:courier_authdaemon_t:s0 tcontext=unconfined_u:object_r:var_spool_t:s0 tclass=sock_file
type=1400 audit(1219677683.516:34): avc:  denied  { setattr } for  pid=7714 comm="authdaemond" name="socket.tmp" dev=dm-0 ino=368739 scontext=unconfined_u:system_r:courier_authdaemon_t:s0 tcontext=unconfined_u:object_r:var_spool_t:s0 tclass=sock_file
type=1400 audit(1219677683.517:35): avc:  denied  { remove_name } for  pid=7714 comm="authdaemond" name="socket.tmp" dev=dm-0 ino=368739 scontext=unconfined_u:system_r:courier_authdaemon_t:s0 tcontext=system_u:object_r:var_spool_t:s0 tclass=dir
type=1400 audit(1219677683.517:36): avc:  denied  { rename } for  pid=7714 comm="authdaemond" name="socket.tmp" dev=dm-0 ino=368739 scontext=unconfined_u:system_r:courier_authdaemon_t:s0 tcontext=unconfined_u:object_r:var_spool_t:s0 tclass=sock_file

369092 is /var/spool and 368811 is /var/spool/authdaemon.

So what needs to be done is probably:

1. grant courier_authdaemon_t the right to search var_spool_t
2. change /var/spool/authdaemon/* to have context courier_spool_t
3. grant courier_authdaemon_t full access to courier_spool_t