authdaemond: Deprecated pam_stack module called from service "imap" on CentOS-5.2

If you have the following message in /var/log/secure,

authdaemond: Deprecated pam_stack module called from service "imap"

the description of pam rules causes it.

You can avoid the error to change the following description in /etc/pam.d/imap:

auth required pam_stack.so service=system-auth

to

auth include system-auth

.