DNS-based White/Black/Grey-list

Czech title

White/Black/Grey-list založený na DNS

Type

software

License

Use of the result by another entity is possible without acquiring a license (the result is not licensed)

License Fee

The licensor does not require a license fee for the result

Authors

Vašíček Zdeněk, doc. Ing., Ph.D. (DCSY)
Vavruša Marek, Bc.

Keywords

DNS, Postfix, Sendmail, Milter, Greylist, Whitelist, Blacklist

Description

pyGreylist is a milter plugin written in Python that implements the greylist
filtering method proposed by Evan Harris. It works by assuming that, spam engines
will not retry sending their junk mail on a temporary error. The idea is to
reject mail on a first attempt and then accept it after some time has elapsed.
According to the SMTP specification, properly configured mail server should
attempt to retry a delivery if it receives an temporary failure code.

Location

- http://www.fit.vutbr.cz/~vasicek/nic-vip/greylist/ (http://www.fit.vutbr.cz/%7Evasicek/nic-vip/greylist/)

License Conditions

Free software under the terms of BSD license (see http://www.opensource.org/licenses/bsd-license.php)

Projects

Security-Oriented Research in Information Technology, MŠMT, Institucionální prostředky SR ČR (např. VZ, VC), MSM0021630528, start: 2007-01-01, end: 2013-12-31, running

Departments

Department of Computer Systems (DCSY)
Faculty of Information Technology (FIT)