Milter-greylist

> don´t compile in Centos 5.6 with bind97
> 
> dnsrbl.c:205: undefined reference to `__ns_initparse'
> dnsrbl.c:211: undefined reference to `__ns_parserr'
> 
> 
> ./configure --enable-postfix --enable-dnsrbl --with-user=postfix
> --with-libbind=/usr --enable-spamassassin

Looks like you need nameser.h:

arpa/nameser.h:#define ns_initparse		__ns_initparse
arpa/nameser.h:#define ns_parserr		__ns_parserr