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用 google 查了一下,ASSP 这个东西貌似功能很强大,是用perl 实现的。
http://en.wikipedia.org/wiki/Anti-Spam_SMTP_Proxy
- Some ASSP's features are:
- * Bayesian analysis
- * 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.
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另外有一个用 c 实现的,也类似
http://smtp-proxy.klolik.org/
- Supports
- 1. Content scanning:
- 1. Clam AntiVirus daemon (clamd)
- 2. mksd - daemonised version of mks_vir
- 3. SpamAssassin antispam scanning
- 2. Access checking:
- 1. libpcre for HELO/MAIL FROM/RCPT TO match
- 2. libspf2 for SPF (tested with debian libspf2 1.2.1)
- 3. Uses various NAT frameworks (for standalone mode), or ident/proxy-helper* for external mode
- 1. patched ident daemon
- 2. proxy-helper daemon (soon)
- 3. netfilter framework of Linux
- 4. ipfw on FreeBSD
- 5. BSD/pf (packetfilter)
- 6. BSD/ipfilter
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有人用过这两个东东吗? |
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