/* This file is part of mailfrom filter.
   Copyright (C) 2005, 2006 Sergey Poznyakoff

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301 USA */

#pragma option relay "/etc/mail/sendmail.cw"
#pragma option relay "/etc/mail/relay-domains"
#pragma option timeout 33
#pragma option mailfrom ""
#pragma option ehlo "your.domain"
#pragma regex +extended +icase
#pragma option debug 1

prog envfrom
do
    if $f = ""
        next
    elif hostname ${client_addr} matches ".*(adsl|sdsl|hdsl|ldsl|dialin|dialup|ppp|dhcp|dynamic).*"
        reject 550 5.7.1 "Use your SMTP relay"
    elif hostname ${client_addr} matches ".*-[0-9]{1,3}-[0-9]{1,3}-[0-9]{1,3}-[0-9]{1,3}.*"
        on poll host ${client_addr} for $f do
        when success:
            next
        when not_found or failure:
            reject 550 5.1.0 "Sender validity not confirmed"
        when temp_failure:
            tempfail 450 4.1.0 "Try again later"
        done
    elif relayed hostname ${client_addr} 
        next
    elif $f mx fnmatches "*.yahoo.com"
        or $f mx fnmatches "*.namaeserver.com"
	next
    else
        on poll $f do
        when success:
            next
        when not_found or failure:
            reject 550 5.1.0 "Sender validity not confirmed"
        when temp_failure:
            tempfail
        done
    fi

    if rate($f "-" ${client_addr}, interval("1 hour 30 minutes")) > 100
        tempfail 450 4.7.0 "Mail sending rate exceeded. Try again later"
    fi
done

prog envrcpt
do
   set gltime interval("1 hour")
   if $f mx fnmatches "*.yahoo.com"
      or $f mx fnmatches "*.namaeserver.com"
      and not dbmap("/var/run/whitelist.db", $client_addr)
      if greylist($client_addr "-" $f "-" $rcpt_addr, %gltime)
         if %greylist_seconds_left = %gltime
             tempfail 450 4.7.0
                "You are greylisted for " %gltime " seconds"
         else
             tempfail 450 4.7.0
                "Still greylisted for "
                %greylist_seconds_left " seconds"
         fi
      fi
   fi
done