Am 24.07.2012 10:22, schrieb fy: > 于 2012/7/24 15:16, Arnaud Abélard 写道: >> On 07/24/2012 06:49 AM, Noel Butler wrote: >>> On Tue, 2012-07-24 at 11:58 +0800, fy wrote: >>> >>>> what anti-spam for you used ? dspam?spammassian? amavisd-new ? what is >>>> best ? >>> >>> >>> amavisd-new with spamassassin and anti virus scanner, clamav with >>> sanesecurity rules >>> use enforcing rules in mail server, like block hosts with no DNS/rDNS >>> Enforce SPF, publish SPF with hardfail >>> use DNSBL's in your mail server, spamhaus, spamcop, spam.sorbs, and >>> more etc. >>> milter regex to stop dynamic/suspect hosts >> >> And first of all, even if this is not dovecot related, use a >> greylisting solution. >> >>> >>> There is no one solution, the solution, is a box of many tricks >>> You might get the odd false blocking, but if system opers can not be >>> bothered running a compliant network with standardised naming >>> conventions for servers, then it is not my problem, and we have had very >>> very very few complaints about this type of policy in over a decade. If >>> someoine sooks to you, educate them, dont whitelist them. >> >> Indeed! Fighting spam is a continuous task. While greylisting will cut >> down the amount of spam by more than 50%, the remaining 50% will give >> you the hardest time and will keep changing to bypass your rules. >> You'll need to keep an eye on the flow of false negatives or false >> positive you are getting... >> >> We (72,000 mailboxes) are currently using amavisd-new with >> spamassassin and CRM114 via a custom plugin instead of the default >> bayesian filter. Also like Noel, we're using DNSBLs, SPF (although we >> had to publish a permissive record since some of our users are using >> their ISP smtp instead of our own). >> >> Arnaud >> >> >>> >>> >> >> > try slockd ,it is a policy server for postfix > http://www.extmail.org/download
sadly there is only poor english info -- Best Regards MfG Robert Schetterer