Am 20.10.2012 18:01, schrieb Jeroen Geilman: > On 10/20/2012 03:14 PM, Mike's unattended mail wrote: >> On 2012-09-21, Mikkel Bang <facebookman...@gmail.com> wrote: >>> What are these more intelligent, less crude techniques you talk about? >> * content analysis (high quality but computationally costly) >> * greylisting >> >> crude and sloppy cost-cutting approaches: >> >> * dnsbl >> * reject_non_fqdn_helo_hostname > > I am curious how you arrive at this blatantly provocative judgement. > > DNSBLs are recommended by just about everyone who is serious about > email, and a proper EHLO is actually an RFC requirement. > > This makes me wonder if it isn't you who represents some sort of > ulterior agenda. > >
sometimes you have to face real world, so whitelisting has to be done with some servers perhaps do it like this smtpd_helo_restrictions = permit_mynetworks, permit_sasl_authenticated, ... check_client_access hash:/etc/postfix/whitelist_client_helo_hostname_access, reject_invalid_hostname, reject_non_fqdn_hostname, check_helo_access hash:/etc/postfix/helo_access, ... reject_unauth_pipelining with i.e /etc/postfix/helo_access .... localhost REJECT i am localhost myself .... and yes youre right rbls are a strong tool, but have to be choosen in a critical mind about their special functions and relate your setup needs combined with some other antispam stuff and selective setup rbls are working fine ( which means less false postives ) so you might work with smtpd_restriction_classes anyway checking logs and monitoring is daily postmaster work you never will goal the ultimate mailserver setup ( so the subject is is wrong anyway), in special when you do mailhosting for other people, so your setup has to face always the real needs of the day to provide best service you can, so you have to jugde daily new what fits best to your needs these spamdays searching postfix archives and www sites should be good enough finding a good starting setup for postfix, if facing any problems then ,the list is right place to ask -- Best Regards MfG Robert Schetterer [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer Aufsichtsratsvorsitzender: Joerg Heidrich
