Thursday, August 2, 2012

Yahoo is currently the worst Spam sender

Currently we see massive Spam outbreaks from within the Yahoo network. Nearly 3 of 4 Spam mails hitting our spam traps originate from Yahoo.
The numbers do only count the spam trap hits by real MTAs (Mail Transfer Agents) and explicitly exclude any dynamic IP range or customer associated IPs.

Wednesday, April 13, 2011

Locaweb S/A solved their spam problem

For months now Locaweb (Brazil) had a bad reputation on sending (better: relaying) huge amounts of Spam. But after some mail exchange they finally got the Spam problem solved. They now gained the "good reputation" status at NiX Spam and were added to the Whitelist.

Sunday, April 10, 2011

Postfix as a spam trap server

If you want to build a Spam trap with Postfix this can be done very very easy. You don't even have to configure Postfix to act as a Spam trap.
Postfix ships with a neat tool called smtp-sink which does the trick.
smtp-sink is mainly intended to act as a testing tool for SMTP clients which need a Server to play with. So you can configure it to log the whole conversation or even dump each received mail to a file. The latter is needed for a spamtrap.

Saturday, January 8, 2011

The background of Facebook's invitation spam

During the last months the spam traps at NiX Spam received thousands of unrequested Facebook invitations. As they are unsolicited bulk mails these are spam. But Facebook did not recognize the problem until Return Path got involved.

Sunday, December 26, 2010

Christmas time increases spammer's creativity

Every year around Christmas the spammers show their creativity and they try to figure out how to bypass existing spam filters. Currently they try spam bursts.

Tuesday, December 21, 2010

NiX Spam is a fairly good DNSBL

The German Anti-Spam blacklist "NiX Spam" of the iX magazine is under the Top 10 of several blacklist monitoring sites.

Monday, December 20, 2010 and are not Wikileaks

At this time of writing, the domains and do not mirror the original content of the Wikileaks Project.
Be warned if you visit these sites.
The domains and lead to a hosting platform of a so called bullet-proof hoster. The hoster and their reseller are known as also hosting phishing and malware sites. This is why Anti-Spam companies like Spamhaus and Trend Micro warned explicitly to visit these sites.