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README.md

spamassassin-extremeshok_fromreplyto

Maintained and provided by https://eXtremeSHOK.com

Description

Configures spamassassin to score mails with various rules against the reply-to, from and to headers. Spam often uses a different From: and Reply-To: Whilst most legitimate email does not. Spam often uses the same From: and To: Whilst most legitimate email does not Same domain checking Logic, will allow for different sub-domains of the same domain name.

REQUIRES

spamassassin

INSTALL GUIDE

create the plugin directory.

mkdir /etc/mail/spamassassin/plugins/

Download and save the plugins to /etc/mail/spamassassin/plugins/

Download and save 01_extremeshok_fromreplyto.cf to /etc/mail/spamassassin/01_extremeshok_fromreplyto.cf

Verify the installation with the following command.

spamassassin -D --lint 2>&1 | grep -i failed

NOTE

For scoring email with the following

From: "auto-confirm@amazon.com" <mary@doublediamonddairy.com>

Add this custom SA rule:

header	  FROM_NAME_SPOOF From =~ /^.*@.*<.*@.*>/i
describe  FROM_NAME_SPOOF FromNameSpoof
score 	  FROM_NAME_SPOOF 5.0

Version 1.7 (updated 2018-03-22)

  • eXtremeSHOK.com Maintenance
  • Allow whitelisting of your contact form, view comments in plugins/FromIsNotReplyToWhitelist.pm
  • Added $check_replyTo_full_address and $check_from_full_address variables to plugins/FromIsNotReplyToWhitelist.pm
  • Bugfix: Array Index values wrong @slider182

Version 1.6 (updated 2017-10-16)

  • eXtremeSHOK.com Maintenance
  • Added FromAndToIsSameDomain which can either increase or decrease the score

Version 1.5 (updated 2016-07-11)

  • eXtremeSHOK.com Maintenance
  • Fixed dbg: plugin: did not register FromIsTo, already registered
  • Refactored to better support spamassassin 3.4 and newer

Version 1.4

  • eXtremeSHOK.com Maintenance
  • More unique variable names
  • Fixed FromIsTo to check if the from and to are the same, then increase the spam score
  • Added FromIsReplyTo to decrease spam score
  • Fixed spam score points

Version 1.3.1

  • eXtremeSHOK.com Maintenance
  • More unique variable names
  • Fixed warn: Global symbol

Version 1.3

  • eXtremeSHOK.com Maintenance
  • Added FromIsTo, most spam emails the from" and to" is identical
  • Minor code cleanups
  • Project renamed
  • Improved documentation

Version 1.2.10

  • eXtremeSHOK.com Maintenance
  • Fix for scoring missing from/replyto as a fail

Version 1.2.0

  • eXtremeSHOK.com Maintenance
  • Better logic with domain checking, will allow for different sub-domains of the same domain name.

About

Configures spamassassin to score mails with various rules against the reply-to, from and to headers.

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