Sendmail Sender Address Validator

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1.4.0 GPL (GNU General Public License)    
5.0/5 1
smf-sav is a lightweight, fast and reliable Sendmail milter that implements a real-time Sender e-Mail Address Verification.

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smf-sav is a lightweight, fast and reliable Sendmail milter that implements a real-time Sender e-Mail Address Verification technology. This technology can stop some kind of SPAM with a spoofed sender's e-Mail address.

Also it implements a real-time Recipient e-Mail Address Verification technology. It can be useful if your machine is a backup MX for the recipient's domain or if your machine forwards all e-Mail messages for your domain to another (presumably internal) e-Mail server. Sendmail Sender Address Validator is written in C.

Here are some key features of "Sendmail Sender Address Validator":

friendly hosts/networks whitelist;
SMTP AUTH support;
strictly RFC-2821 compliant MX callback engine;
tolerance against non RFC-2821 compliant e-Mail servers;
blocking of e-Mail messages with a spoofed sender's e-Mail address;
recipient's e-Mail address verification with an authoritative e-Mail store in gateway mode;
slow down of recipient's e-Mail address brute force attacks in gateway mode.

What's New in This Release:

Whitelisting by a PTR (reverse DNS) record was implemented.
Whitelisting by an envelope recipient email address was implemented.
The option to ignore tempfailed results of SAV was implemented.
The option to refuse email messages from systems that don't accept the null reverse-path was implemented.
Tempfail and fail results TTL settings were segregated.
Progressive slowdown of brute force attacks on a recipient's email address was implemented.
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Last updated on October 30th, 2006

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