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.