Mail::SpamAssassin::Plugin::Hashcash

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Mail::SpamAssassin::PUsernContributed3Mail::SpamAssassin::Plugin::Hashcash(3)



NAME
       Mail::SpamAssassin::Plugin::Hashcash - perform hashcash verification
       tests

SYNOPSIS
	 loadplugin	Mail::SpamAssassin::Plugin::Hashcash

DESCRIPTION
       Hashcash is a payment system for email where CPU cycles used as the
       basis for an e-cash system.  This plugin makes it possible to use
       valid hashcash tokens added by mail programs as a bonus for messages.

USER SETTINGS
       use_hashcash { 1 │ 0 }	(default: 1)
	   Whether to use hashcash, if it is available.

       hashcash_accept add@ress.com ...
	   Used to specify addresses that we accept HashCash tokens for.  You
	   should set it to match all the addresses that you may receive mail
	   at.

	   Like whitelist and blacklist entries, the addresses are file-glob-
	   style patterns, so "friend@somewhere.com", "*@isp.com", or
	   "*.domain.net" will all work.  Specifically, "*" and "?" are
	   allowed, but all other metacharacters are not.  Regular expres-
	   sions are not used for security reasons.

	   The sequence %u is replaced with the current user’s username,
	   which is useful for ISPs or multi-user domains.

	   Multiple addresses per line, separated by spaces, is OK.  Multiple
	   "hashcash_accept" lines is also OK.

       hashcash_doublespend_path /path/to/file	 (default: ~/.spamassas-
       sin/hashcash_seen)
	   Path for HashCash double-spend database.  HashCash tokens are only
	   usable once, so their use is tracked in this database to avoid
	   providing a loophole.

	   By default, each user has their own, in their "~/.spamassassin"
	   directory with mode 0700/0600.  Note that once a token is ’spent’
	   it is written to this file, and double-spending of a hashcash
	   token makes it invalid, so this is not suitable for sharing
	   between multiple users.

       hashcash_doublespend_file_mode		 (default: 0700)
	   The file mode bits used for the HashCash double-spend database
	   file.

	   Make sure you specify this using the ’x’ mode bits set, as it may
	   also be used to create directories.	However, if a file is cre-
	   ated, the resulting file will not have any execute bits set (the
	   umask is set to 111).



perl v5.8.8			  2008Mail::SpamAssassin::Plugin::Hashcash(3)