Is ASSP for me?
From ASSPSMTP
ASSP’s primary target audience is mail administrators or system administrators at smallish institutions. If you operate an ISP or a mailhost with a heterogeneous user base you may not have a good enough consensus about what spam is or is not. It should work well with between 1 and 300 client addresses and a mail volume of up to around 100,000 messages per day. Testing has not been done to verify these ranges – if you discover otherwise please leave a note in the discussion page or send a message to the email list.
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Features
Foremost amongst ASSP's features are:
- Ability to block or subject-line tag e-mail against a multitude of spam types
- Fully transparent Training Mode for implementation testing
- Bayesian Analysis
- Automatic Bayesian corpus training
- Automatic Whitelisting
- Redlist to control what addresses can and can not be added to the Whitelist
- Allow spam to bypass certain filters per recipient
- RegEx based filters
- Penalty Box (PB) trapping of misbehaving IP addresses
- DNSBL (DNS-based Block List), aka RBL
- SPF (aka Sender Policy Framework)
- SRS fix-up (aka Sender Rewriting Scheme)
- Delaying (aka Greylisting)
- Sender & recipient validation
- Multi-level attachment blocking
- Honeypot e-mail address trapping
- Multiple RFC validation mechanisms
- Low maintenance once setup
- Analysis interface to determine exactly why a message was blocked
- Ability to send copies of all spam to specified address
Benefits
- Simple Integration with existing environment
- Highly customizable filtering mechanisms
- ASSP does not generate e-mail or backscatter. (except for administrative/internal spam/notspam report confirmation messages)
- Runs on FreeBSD, Linux, OS X, Windows, and many others
Who is it not for?
- Individual clients.
- ASSP must be installed and configured to filter in-front of an SMTP server.
- Domains which receive mail indirectly.
- Fetchmail for example.
What it is not
- An SMTP server.
- ASSP is proxy between your SMTP server, and SMTP clients (other public SMTP server and your local clients).
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