Author: Stephan  |  Category: Linux, Netzwerk, Weltgeschehen, windows

What are DNS blacklists ?
This are special namesserver returning spamming servers instead of DNS Records.
The advantages are fast updaterate and the availability. And its works everywhere where DNS is working.

Is my server on a blacklist ? .
You need a DNS query with a special syntax ( with the IP of blog.hlawatsch.org and the dnsblacklist of heise.de [¹] as example) :
the IP:
the query

your server is blacklisted if the returned answer contains localhost.
youre server isn’t blacklisted if the returned answer is empty.


nice spambounce

Author: Stephan  |  Category: Linux, Netzwerk

A nice spambounce I’ve seen at work.
Hello good Sir,

I\’m very sorry to inform you that you failed in sending me a spam-mail.
If you\’re continuing, you will fail much more and in the end you will

Your Boss.
Very stylish