https://github.com/iredmail/blacklist_rdns
Kill spammers based on client reverse hostname
https://github.com/iredmail/blacklist_rdns
mail spam-protection
Last synced: 6 months ago
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Kill spammers based on client reverse hostname
- Host: GitHub
- URL: https://github.com/iredmail/blacklist_rdns
- Owner: iredmail
- Created: 2018-04-07T19:06:04.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2018-11-27T02:38:26.000Z (almost 7 years ago)
- Last Synced: 2025-02-13T09:17:46.350Z (8 months ago)
- Topics: mail, spam-protection
- Size: 33.2 KB
- Stars: 2
- Watchers: 1
- Forks: 5
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Kill spammers based on client reverse hostname
File `blacklist_rdns.pcre` is PCRE rules used to match client reverse hostname
and reject matched client.
It's based on file `fqrdns.pcre` from .
This file is provided AS IS with no WARRANTY. It is free software, without
attribute or copyright, and without license. As such, you are completely free
to use it and modify it as you see fit, for your purposes, with absolutely no
strings attached.
# Usage
* Download the `blacklist_rdns.pcre` in `/etc/postfix/`.
* Update `smtpd_client_restrictions =` in `/etc/postfix/main.cf`, include this
file like below:
```
smtpd_client_restrictions =
...
permit_sasl_authenticated
check_client_access pcre:/etc/postfix/blacklist_rdns.pcre
...
```
Make sure the `check_client_access` rule is after `permit_sasl_authenticated`.
# Additional Patterns
If you would like to propose a pattern which isn't currently covered, please
create a new issue or pull request on
so it can be considered for inclusion in the appropriate list.