Milter-greylist

Hello,

searching for a reason I found the dnsrbl_list_cleanup function
of dnsrbl.c which is not called anywhere (?)

A place would be real_close, just before free(priv) like
#ifdef USE_DNSRBL
		dnsrbl_list_cleanup(priv);
#endif

Is the dnsrbl list bound to a single email - or am I
missing something here? DNSBL lookups may take time, and
it's a good idea to keep knowledge for let's say an hour.

Michael