Black list information

Here is black list information for avoiding receiving spam from hosts which cannot be blocked by the generic rules of the S25R anti-spam system.

Black list file for downloading

black-list.txt

Last update: May 02, 2017

In case you make your server download it periodically, please avoid downloading it more frequently than 4 times a day. It seems to be wasteful to download it twice in the time period 23:00--7:00 JST (+0900).

Usage
Put the downloaded black-list.txt file under the /etc/postfix directory and specify it in the /etc/postfix/main.cf file as follows:

smtpd_client_restrictions =
  permit_mynetworks,
  check_client_access regexp:/etc/postfix/white_list,
  check_client_access regexp:/etc/postfix/black-list.txt,
  check_client_access regexp:/etc/postfix/rejections

The listed hosts or domains are not certain that they don't send legitimate mail. Every rejection code is "450", which means temporary rejection. I recommend you to watch the rejection records using the rejection log sorting script, and whitelist the host (in the local white list file /etc/postfix/white_list) when you presume the message legitimate. I wouldn't like to recommend automatic permission by greylisting because the listed spam sending hosts are possible to retry sending.

Legend

The mark "(*)" indicates a host or domain which was reported by a contributor.

Policy
The black list lists hosts or domains which have sent spam (no matter whether it has been received or not) and satisfy any of the following conditions:

The domain doesn't have its website (http://www.domainname/ or http://domainname/). -- The rejection condition is cautious about the whole domain.
Even if the domain has its website (including a redirected page), it doesn't explain its own honest business. -- The rejection condition is cautious about the whole domain.
(This condition includes a blank page, a password request page, an announcement of the domain for sale, a page of links only, or a page of an illegal business.)
The business explained on the website (including a redirected page) is a network service which accommodates hosts under control of the customers, so the hosts have risk of being abused. -- The rejection condition is cautious about only the suspicious host or host group in the domain.
(A mail server under control of the network service provider is not listed even if spam has been sent from it.)

Even if the host doesn't satisfy any of the conditions desribed above, it may be listed in case its behavior is evil (for example, it repeats sending advertisement mail illegally even though the business is legal), or it seems to be suspicious because of the domain owner or other information.

Request for information
When you find a spam sending host which falls under the policy decribed above, or you find a listed host not evil, please report to me.