smf-zombie 1.0.0

smf-zombie is a SendmailTM filter for SPAM and virus filtration from zombie PC.
More than 80% of SPAM is going from the infected Windows computers (zombie PC).
This filter aims to be lightweight, reliable, and simple rather than have a myriad of options. Its written in C and works under Linux/BSD/Solaris.
Main features:
- It only scans the messages less than defined size;
- It has a hosts/networks whitelist;
- It blocks most of the SPAM/virus engines (up to the 95% of them);
- It checks sender IP with most reliable RBL - cbl.abuseat.org;
- It safely rejects "alien" bounces without RFC violating;
- It rejects messages for undisclosed recipients;
- It rejects harmful attachments to prevent virus spreading;
- It logs all filter activities to syslog.
- Small code (does not exceed 400 lines);
- Fast work;
- Stability (production quality);
- Low resources are required;
- No temporary files are created.