I have read the documents for some different Greylisting opportunities for Postfix
This built into Postfix http://www.postfix.org/SMTPD_POLICY_README.html#greylist and popular ones http://wiki.policyd.org http://postgrey.schweikert.ch I am not finding a modern comparison of these and a decision point for choosing one to use best in the latest Postfix versions. Many online postings have a comment but they are most for older versions of Postfix. I wonder if Postfix with modern versions is integrating better ideas and to do it all in one? I think maybe that the choice is not just the recommended built in one of Postifx? It depends on the goals? My interested goals are to block spam with Spamassassin block viruses with ClamAV greylist mail from freemail domains with one policy greylist mail from certain countries with another policy not use Amavis, it is too confusing for me My use will be usually less than 10000 mails per day. What do the experts here do for these policies when all together? There are many choices I know, with so much information. It is like "drinking from a firehose" ! I enjoy though the option to learn and build each piece - it is a better road to sucess. Thanks for your good advice and experience! *S*