Carlos Williams put forth on 2/28/2010 1:55 PM: > On Tue, Oct 27, 2009 at 8:55 AM, Noel Jones <njo...@megan.vbhcs.org> wrote: >> Or you can have postfix add it to main.cf for you by typing the command: >> >> # postconf -e 'address_verify_sender=$double_bounce_sender' > > I added the above parameter > (address_verify_sender=$double_bounce_sender) in my main.cf to keep > spammers from sending spam / junk email to my built in Postmaster > account. I am running a dated version of Postfix 2.3. I added it in my > main.cf and reloaded Postfix. I see it listed in my 'postconf -n' & > just this weekend received this email:
<snip> Carlos, I think it's time you join spam-l and learn all the tricks to fighting spam. http://spam-l.com/mailman/listinfo/spam-l The host that sent you this "postmaster" spam is infected with a spam bot. The IP address is listed on no less than 7 dnsbls. The IP address is dynamic, with generic rDNS. inetnum: 89.204.36.0 - 89.204.49.255 netname: USI_ADSL_USERS5 descr: Dynamic distribution IP's for broadband services 160.40.204.89.access.ttknet.ru You could have blocked this spam with any number of methods, the simplest being adding the following to main.cf: smtpd_recipient_restrictions = reject_rbl_client zen.spamhaus.org If you don't need to receive email from Russia, ever, period, you can use the data at ipdeny.com to build a cidr table and block _ALL_ mail from Russia. You can do this for any country. -- Stan
