+#%PAM-1.0
+
+# We have a common auth and account section, since we don't need to check the
+# "host" attribute, but the "mailHost" attribute. It would be sufficient to
+# use a custom account section, but pam_ldap only loads its config once, so we
+# can't use a different config for just the accoun section.
+
+# These are just taken from common-{auth,account}, but with the config=
+# parameter added.
+auth required pam_ldap.so config=/etc/pam_ldap_dovecot.conf
+
+# pam_unix does general checks based on NSS info, so it also works for ldap
+# users.
+account required pam_unix.so
+
+# pam_ldap does additional checks (in particular checking the host ldap
+# attribute) but needs to be ignored when it does not know about a user.
+# We point the module to an alternative configuration file.
+account [success=ok new_authtok_reqd=ok ignore=ignore user_unknown=ignore default=bad] \
+ pam_ldap.so config=/etc/pam_ldap_dovecot.conf
+
+@include common-session