Mail::SpamAssassin::Plugin::Hashcash - perform hashcash verification tests
Like whitelist and blacklist entries, the addresses are file-glob-style
*.domain.net will all
? are allowed, but all other metacharacters
are not. Regular expressions are not used for security reasons.
%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.
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.
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 created, the resulting file will not have any execute bits set (the umask is set to 111).