/*
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 *  The description of unnotificable addresses list
 *
 *  $Revision: 1.5 $
 *
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    1. Purpose

    The file with the list of unnotificable addresses allows to blocks 
notifying to specified addresses or group of addresses depending on
address role in mail transaction.
    
    The lines starting with # character are considered commentaries and
therefore get skipped, blank lines are also admissible. If the first
meaningful line contains the alike record:

[version=NN]

it means that the records are kept in the NN-version  of the file. If
there is no such a line the file is reputed as written in the  of the
1st version.


    2. Version 1 

ROLE ADDRESS_EXPRESSION
..

    ROLE - { from | to | any } (i.e. either "from", "to" or "any" value).
specify role in term of mail envelope. Notification blocked only if address
matching to ADDRESS_EXPRESSION and address has ROLE in current mail transaction.
    ADDRESS_EXPRESSION - experssion for matching addresses. The expression 
should be written in terms of POSIX regular expressions. The matching is case 
insensitive. For example, name @example.com should be written as "@example\.com". 
Also strongly recommended to enclose all expressions to quotes. Operation NOT
can be used (symbol ! before quoted expression), that that mean to does not 
send notify to address that do not matched by expression, if expression
matched to expression then search continues. Operation NOT very useful to
set notifications only for local users. Operation NOT for @example.com 
equvivalent to "@[^e][^x][^a][^m][^p][^l][^\.][^c][^o][^m]".


    3. Examples
    
1) do not send notify to asv@drweb.ru then he'd sent a virus, but send 
notify then virus came to him:

from  "asv@drweb\.ru"

2) do not send notify to users from example.com then virus came to them,
but send notify then virus came from them:

to    "@example\.com"

3) do not send notify to non-local (not from mydomain.ru) users:

any    !"@mydomain\.ru"


