Anti-Spam SMTP Proxy
| File:20090323 assp logo.jpg | |
| Original author(s) | John Hanna |
|---|---|
| Developer(s) | Fritz Borgstedt in association with the ASSP community |
| Stable release | 2.4.1(14085)
/ March 25, 2014 |
| Written in | Perl |
| Operating system | Cross-platform |
| Type | Email spam filter |
| License | GNU General Public License |
| Website | assp.sourceforge.net |
The Anti-Spam SMTP Proxy (ASSP) is an Open Source, Perl based, platform-independent transparent SMTP proxy server.
Features
Some ASSP's features are:
- Bayesian spam filtering
- Penalty Box (PB) trapping
- DNSBL/RBL (Realtime Blackhole Listing)
- URIBL (Uniform Resource Identifier Black Listing)
- Multi-level SPF (Sender Policy Framework) validation and blocking
- SRS (Sender Rewriting Scheme) fix-up
- Session Delaying/Greylisting and connection response delaying
- Sender validation and recipient validation
- Multi-level attachment blocking (based on block lists or allow lists)
- As well as multiple RFC validation mechanisms.
- Multi-threaded (Since version 2.x)
- Platform independent (Written in Perl)
See also
- Transparent SMTP proxy
- SpamAssassin, popular open source spam filtering that uses razor and other techniques to detect spam.
- Qpsmtpd, a similar project