Login auth request failed: Authenticated user not found from userdb

Other log I’m getting is

pam_authenticate() failed: Authentication failure (/etc/pam.d/imap missing?)

But I have that file with the following content:

#%PAM-1.0
auth	required	pam_apnscpvwh.so	saveroot
auth	required	pam_nologin.so
auth	required	pam_listfile.so onerr=fail item=user sense=allow file=/etc/imap.pamlist
auth       include  system-auth
account    include  system-auth
password   include  system-auth
session    include  system-auth
session required pam_apnscpvwh.so restorelogin restoreroot

I don’t have the file /etc/imap.pamlist

Don’t know if this helps.

Thanks again