User 'admin' - failed auth, from=127.0.0.1
in your /var/log/messages file, then you may have a newer setup for pam. Edit your /etc/pam.d/vm-pop3d file. Change:#%PAM-1.0
auth required /lib/security/pam_pwdb.so shadow
account required /lib/security/pam_pwdb.so
#%PAM-1.0
auth required /lib/security/pam_unix.so shadow
account required /lib/security/pam_unix.so
#%PAM-1.0
auth required /lib64/security/pam_unix.so shadow
account required /lib64/security/pam_unix.so