680 lines
22 KiB
Lua
680 lines
22 KiB
Lua
rspamd_config.MAILCOW_AUTH = {
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callback = function(task)
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local uname = task:get_user()
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if uname then
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return 1
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end
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end
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}
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local monitoring_hosts = rspamd_config:add_map{
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url = "/etc/rspamd/custom/monitoring_nolog.map",
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description = "Monitoring hosts",
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type = "regexp"
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}
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rspamd_config:register_symbol({
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name = 'SMTP_ACCESS',
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type = 'postfilter',
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callback = function(task)
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local util = require("rspamd_util")
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local rspamd_logger = require "rspamd_logger"
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local rspamd_ip = require 'rspamd_ip'
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local uname = task:get_user()
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local limited_access = task:get_symbol("SMTP_LIMITED_ACCESS")
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if not uname then
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return false
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end
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if not limited_access then
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return false
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end
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local hash_key = 'SMTP_ALLOW_NETS_' .. uname
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local redis_params = rspamd_parse_redis_server('smtp_access')
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local ip = task:get_from_ip()
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if ip == nil or not ip:is_valid() then
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return false
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end
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local from_ip_string = tostring(ip)
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smtp_access_table = {from_ip_string}
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local maxbits = 128
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local minbits = 32
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if ip:get_version() == 4 then
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maxbits = 32
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minbits = 8
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end
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for i=maxbits,minbits,-1 do
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local nip = ip:apply_mask(i):to_string() .. "/" .. i
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table.insert(smtp_access_table, nip)
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end
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local function smtp_access_cb(err, data)
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if err then
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rspamd_logger.infox(rspamd_config, "smtp_access query request for ip %s returned invalid or empty data (\"%s\") or error (\"%s\")", ip, data, err)
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return false
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else
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rspamd_logger.infox(rspamd_config, "checking ip %s for smtp_access in %s", from_ip_string, hash_key)
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for k,v in pairs(data) do
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if (v and v ~= userdata and v == '1') then
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rspamd_logger.infox(rspamd_config, "found ip in smtp_access map")
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task:insert_result(true, 'SMTP_ACCESS', 0.0, from_ip_string)
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return true
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end
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end
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rspamd_logger.infox(rspamd_config, "couldnt find ip in smtp_access map")
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task:insert_result(true, 'SMTP_ACCESS', 999.0, from_ip_string)
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return true
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end
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end
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table.insert(smtp_access_table, 1, hash_key)
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local redis_ret_user = rspamd_redis_make_request(task,
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redis_params, -- connect params
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hash_key, -- hash key
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false, -- is write
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smtp_access_cb, --callback
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'HMGET', -- command
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smtp_access_table -- arguments
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)
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if not redis_ret_user then
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rspamd_logger.infox(rspamd_config, "cannot check smtp_access redis map")
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end
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end,
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priority = 10
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})
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rspamd_config:register_symbol({
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name = 'POSTMASTER_HANDLER',
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type = 'prefilter',
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callback = function(task)
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local rcpts = task:get_recipients('smtp')
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local rspamd_logger = require "rspamd_logger"
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local lua_util = require "lua_util"
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local from = task:get_from(1)
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-- not applying to mails with more than one rcpt to avoid bypassing filters by addressing postmaster
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if rcpts and #rcpts == 1 then
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for _,rcpt in ipairs(rcpts) do
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local rcpt_split = rspamd_str_split(rcpt['addr'], '@')
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if #rcpt_split == 2 then
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if rcpt_split[1] == 'postmaster' then
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task:set_pre_result('accept', 'whitelisting postmaster smtp rcpt')
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return
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end
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end
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end
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end
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if from then
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for _,fr in ipairs(from) do
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local fr_split = rspamd_str_split(fr['addr'], '@')
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if #fr_split == 2 then
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if fr_split[1] == 'postmaster' and task:get_user() then
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-- no whitelist, keep signatures
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task:insert_result(true, 'POSTMASTER_FROM', -2500.0)
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return
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end
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end
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end
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end
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end,
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priority = 10
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})
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rspamd_config:register_symbol({
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name = 'KEEP_SPAM',
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type = 'prefilter',
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callback = function(task)
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local util = require("rspamd_util")
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local rspamd_logger = require "rspamd_logger"
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local rspamd_ip = require 'rspamd_ip'
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local uname = task:get_user()
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if uname then
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return false
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end
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local redis_params = rspamd_parse_redis_server('keep_spam')
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local ip = task:get_from_ip()
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if ip == nil or not ip:is_valid() then
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return false
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end
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local from_ip_string = tostring(ip)
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ip_check_table = {from_ip_string}
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local maxbits = 128
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local minbits = 32
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if ip:get_version() == 4 then
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maxbits = 32
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minbits = 8
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end
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for i=maxbits,minbits,-1 do
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local nip = ip:apply_mask(i):to_string() .. "/" .. i
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table.insert(ip_check_table, nip)
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end
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local function keep_spam_cb(err, data)
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if err then
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rspamd_logger.infox(rspamd_config, "keep_spam query request for ip %s returned invalid or empty data (\"%s\") or error (\"%s\")", ip, data, err)
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return false
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else
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for k,v in pairs(data) do
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if (v and v ~= userdata and v == '1') then
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rspamd_logger.infox(rspamd_config, "found ip in keep_spam map, setting pre-result")
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task:set_pre_result('accept', 'ip matched with forward hosts')
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end
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end
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end
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end
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table.insert(ip_check_table, 1, 'KEEP_SPAM')
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local redis_ret_user = rspamd_redis_make_request(task,
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redis_params, -- connect params
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'KEEP_SPAM', -- hash key
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false, -- is write
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keep_spam_cb, --callback
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'HMGET', -- command
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ip_check_table -- arguments
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)
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if not redis_ret_user then
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rspamd_logger.infox(rspamd_config, "cannot check keep_spam redis map")
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end
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end,
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priority = 19
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})
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rspamd_config:register_symbol({
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name = 'TLS_HEADER',
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type = 'postfilter',
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callback = function(task)
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local rspamd_logger = require "rspamd_logger"
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local tls_tag = task:get_request_header('TLS-Version')
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if type(tls_tag) == 'nil' then
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task:set_milter_reply({
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add_headers = {['X-Last-TLS-Session-Version'] = 'None'}
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})
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else
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task:set_milter_reply({
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add_headers = {['X-Last-TLS-Session-Version'] = tostring(tls_tag)}
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})
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end
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end,
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priority = 12
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})
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rspamd_config:register_symbol({
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name = 'TAG_MOO',
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type = 'postfilter',
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callback = function(task)
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local util = require("rspamd_util")
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local rspamd_logger = require "rspamd_logger"
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local redis_params = rspamd_parse_redis_server('taghandler')
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local rspamd_http = require "rspamd_http"
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local rcpts = task:get_recipients('smtp')
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local lua_util = require "lua_util"
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local tagged_rcpt = task:get_symbol("TAGGED_RCPT")
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local mailcow_domain = task:get_symbol("RCPT_MAILCOW_DOMAIN")
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local function remove_moo_tag()
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local moo_tag_header = task:get_header('X-Moo-Tag', false)
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if moo_tag_header then
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task:set_milter_reply({
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remove_headers = {['X-Moo-Tag'] = 0},
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})
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end
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return true
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end
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if tagged_rcpt and tagged_rcpt[1].options and mailcow_domain then
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local tag = tagged_rcpt[1].options[1]
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rspamd_logger.infox("found tag: %s", tag)
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local action = task:get_metric_action('default')
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rspamd_logger.infox("metric action now: %s", action)
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if action ~= 'no action' and action ~= 'greylist' then
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rspamd_logger.infox("skipping tag handler for action: %s", action)
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remove_moo_tag()
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return true
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end
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local function http_callback(err_message, code, body, headers)
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if body ~= nil and body ~= "" then
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rspamd_logger.infox(rspamd_config, "expanding rcpt to \"%s\"", body)
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local function tag_callback_subject(err, data)
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if err or type(data) ~= 'string' then
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rspamd_logger.infox(rspamd_config, "subject tag handler rcpt %s returned invalid or empty data (\"%s\") or error (\"%s\") - trying subfolder tag handler...", body, data, err)
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local function tag_callback_subfolder(err, data)
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if err or type(data) ~= 'string' then
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rspamd_logger.infox(rspamd_config, "subfolder tag handler for rcpt %s returned invalid or empty data (\"%s\") or error (\"%s\")", body, data, err)
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remove_moo_tag()
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else
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rspamd_logger.infox("Add X-Moo-Tag header")
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task:set_milter_reply({
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add_headers = {['X-Moo-Tag'] = 'YES'}
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})
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end
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end
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local redis_ret_subfolder = rspamd_redis_make_request(task,
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redis_params, -- connect params
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body, -- hash key
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false, -- is write
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tag_callback_subfolder, --callback
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'HGET', -- command
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{'RCPT_WANTS_SUBFOLDER_TAG', body} -- arguments
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)
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if not redis_ret_subfolder then
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rspamd_logger.infox(rspamd_config, "cannot make request to load tag handler for rcpt")
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remove_moo_tag()
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end
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else
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rspamd_logger.infox("user wants subject modified for tagged mail")
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local sbj = task:get_header('Subject')
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new_sbj = '=?UTF-8?B?' .. tostring(util.encode_base64('[' .. tag .. '] ' .. sbj)) .. '?='
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task:set_milter_reply({
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remove_headers = {
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['Subject'] = 1,
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['X-Moo-Tag'] = 0
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},
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add_headers = {['Subject'] = new_sbj}
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})
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end
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end
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local redis_ret_subject = rspamd_redis_make_request(task,
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redis_params, -- connect params
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body, -- hash key
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false, -- is write
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tag_callback_subject, --callback
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'HGET', -- command
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{'RCPT_WANTS_SUBJECT_TAG', body} -- arguments
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)
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if not redis_ret_subject then
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rspamd_logger.infox(rspamd_config, "cannot make request to load tag handler for rcpt")
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remove_moo_tag()
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end
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end
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end
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if rcpts and #rcpts == 1 then
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for _,rcpt in ipairs(rcpts) do
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local rcpt_split = rspamd_str_split(rcpt['addr'], '@')
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if #rcpt_split == 2 then
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if rcpt_split[1] == 'postmaster' then
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rspamd_logger.infox(rspamd_config, "not expanding postmaster alias")
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remove_moo_tag()
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else
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rspamd_http.request({
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task=task,
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url='http://nginx:8081/aliasexp.php',
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body='',
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callback=http_callback,
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headers={Rcpt=rcpt['addr']},
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})
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end
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end
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end
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end
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else
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remove_moo_tag()
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end
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end,
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priority = 19
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})
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rspamd_config:register_symbol({
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name = 'BCC',
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type = 'postfilter',
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callback = function(task)
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local util = require("rspamd_util")
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local rspamd_http = require "rspamd_http"
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local rspamd_logger = require "rspamd_logger"
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local from_table = {}
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local rcpt_table = {}
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if task:has_symbol('ENCRYPTED_CHAT') then
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return -- stop
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end
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local send_mail = function(task, bcc_dest)
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local lua_smtp = require "lua_smtp"
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local function sendmail_cb(ret, err)
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if not ret then
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rspamd_logger.errx(task, 'BCC SMTP ERROR: %s', err)
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else
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rspamd_logger.infox(rspamd_config, "BCC SMTP SUCCESS TO %s", bcc_dest)
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end
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end
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if not bcc_dest then
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return -- stop
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end
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-- dot stuff content before sending
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local email_content = tostring(task:get_content())
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email_content = string.gsub(email_content, "\r\n%.", "\r\n..")
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-- send mail
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lua_smtp.sendmail({
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task = task,
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host = os.getenv("IPV4_NETWORK") .. '.253',
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port = 591,
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from = task:get_from(stp)[1].addr,
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recipients = bcc_dest,
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helo = 'bcc',
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timeout = 20,
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}, email_content, sendmail_cb)
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end
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-- determine from
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local from = task:get_from('smtp')
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if from then
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for _, a in ipairs(from) do
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table.insert(from_table, a['addr']) -- add this rcpt to table
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table.insert(from_table, '@' .. a['domain']) -- add this rcpts domain to table
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end
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else
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return -- stop
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end
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-- determine rcpts
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local rcpts = task:get_recipients('smtp')
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if rcpts then
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for _, a in ipairs(rcpts) do
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table.insert(rcpt_table, a['addr']) -- add this rcpt to table
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table.insert(rcpt_table, '@' .. a['domain']) -- add this rcpts domain to table
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end
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else
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return -- stop
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end
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local action = task:get_metric_action('default')
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rspamd_logger.infox("metric action now: %s", action)
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local function rcpt_callback(err_message, code, body, headers)
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if err_message == nil and code == 201 and body ~= nil then
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if action == 'no action' or action == 'add header' or action == 'rewrite subject' then
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send_mail(task, body)
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end
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end
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end
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local function from_callback(err_message, code, body, headers)
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if err_message == nil and code == 201 and body ~= nil then
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if action == 'no action' or action == 'add header' or action == 'rewrite subject' then
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send_mail(task, body)
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end
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end
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end
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if rcpt_table then
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for _,e in ipairs(rcpt_table) do
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rspamd_logger.infox(rspamd_config, "checking bcc for rcpt address %s", e)
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rspamd_http.request({
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task=task,
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url='http://nginx:8081/bcc.php',
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body='',
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callback=rcpt_callback,
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headers={Rcpt=e}
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})
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end
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end
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if from_table then
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for _,e in ipairs(from_table) do
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rspamd_logger.infox(rspamd_config, "checking bcc for from address %s", e)
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rspamd_http.request({
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task=task,
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url='http://nginx:8081/bcc.php',
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body='',
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callback=from_callback,
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headers={From=e}
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})
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end
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end
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return true
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end,
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priority = 20
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})
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rspamd_config:register_symbol({
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name = 'DYN_RL_CHECK',
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type = 'prefilter',
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callback = function(task)
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local util = require("rspamd_util")
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local redis_params = rspamd_parse_redis_server('dyn_rl')
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local rspamd_logger = require "rspamd_logger"
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local envfrom = task:get_from(1)
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local uname = task:get_user()
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if not envfrom or not uname then
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return false
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end
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local uname = uname:lower()
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local env_from_domain = envfrom[1].domain:lower() -- get smtp from domain in lower case
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local function redis_cb_user(err, data)
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if err or type(data) ~= 'string' then
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rspamd_logger.infox(rspamd_config, "dynamic ratelimit request for user %s returned invalid or empty data (\"%s\") or error (\"%s\") - trying dynamic ratelimit for domain...", uname, data, err)
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local function redis_key_cb_domain(err, data)
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if err or type(data) ~= 'string' then
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rspamd_logger.infox(rspamd_config, "dynamic ratelimit request for domain %s returned invalid or empty data (\"%s\") or error (\"%s\")", env_from_domain, data, err)
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else
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rspamd_logger.infox(rspamd_config, "found dynamic ratelimit in redis for domain %s with value %s", env_from_domain, data)
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task:insert_result('DYN_RL', 0.0, data, env_from_domain)
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end
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end
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local redis_ret_domain = rspamd_redis_make_request(task,
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redis_params, -- connect params
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env_from_domain, -- hash key
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false, -- is write
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redis_key_cb_domain, --callback
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'HGET', -- command
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{'RL_VALUE', env_from_domain} -- arguments
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)
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if not redis_ret_domain then
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rspamd_logger.infox(rspamd_config, "cannot make request to load ratelimit for domain")
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end
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else
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rspamd_logger.infox(rspamd_config, "found dynamic ratelimit in redis for user %s with value %s", uname, data)
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task:insert_result('DYN_RL', 0.0, data, uname)
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end
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end
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local redis_ret_user = rspamd_redis_make_request(task,
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redis_params, -- connect params
|
|
uname, -- hash key
|
|
false, -- is write
|
|
redis_cb_user, --callback
|
|
'HGET', -- command
|
|
{'RL_VALUE', uname} -- arguments
|
|
)
|
|
if not redis_ret_user then
|
|
rspamd_logger.infox(rspamd_config, "cannot make request to load ratelimit for user")
|
|
end
|
|
return true
|
|
end,
|
|
flags = 'empty',
|
|
priority = 20
|
|
})
|
|
|
|
rspamd_config:register_symbol({
|
|
name = 'NO_LOG_STAT',
|
|
type = 'postfilter',
|
|
callback = function(task)
|
|
local from = task:get_header('From')
|
|
if from and (monitoring_hosts:get_key(from) or from == "watchdog@localhost") then
|
|
task:set_flag('no_log')
|
|
task:set_flag('no_stat')
|
|
end
|
|
end
|
|
})
|
|
|
|
rspamd_config:register_symbol({
|
|
name = 'MOO_FOOTER',
|
|
type = 'prefilter',
|
|
callback = function(task)
|
|
local cjson = require "cjson"
|
|
local lua_mime = require "lua_mime"
|
|
local lua_util = require "lua_util"
|
|
local rspamd_logger = require "rspamd_logger"
|
|
local rspamd_http = require "rspamd_http"
|
|
local envfrom = task:get_from(1)
|
|
local uname = task:get_user()
|
|
if not envfrom or not uname then
|
|
return false
|
|
end
|
|
local uname = uname:lower()
|
|
local env_from_domain = envfrom[1].domain:lower()
|
|
local env_from_addr = envfrom[1].addr:lower()
|
|
|
|
-- determine newline type
|
|
local function newline(task)
|
|
local t = task:get_newlines_type()
|
|
|
|
if t == 'cr' then
|
|
return '\r'
|
|
elseif t == 'lf' then
|
|
return '\n'
|
|
end
|
|
|
|
return '\r\n'
|
|
end
|
|
-- retrieve footer
|
|
local function footer_cb(err_message, code, data, headers)
|
|
if err or type(data) ~= 'string' then
|
|
rspamd_logger.infox(rspamd_config, "domain wide footer request for user %s returned invalid or empty data (\"%s\") or error (\"%s\")", uname, data, err)
|
|
else
|
|
|
|
-- parse json string
|
|
local footer = cjson.decode(data)
|
|
if not footer then
|
|
rspamd_logger.infox(rspamd_config, "parsing domain wide footer for user %s returned invalid or empty data (\"%s\") or error (\"%s\")", uname, data, err)
|
|
else
|
|
if footer and type(footer) == "table" and (footer.html and footer.html ~= "" or footer.plain and footer.plain ~= "") then
|
|
rspamd_logger.infox(rspamd_config, "found domain wide footer for user %s: html=%s, plain=%s, vars=%s", uname, footer.html, footer.plain, footer.vars)
|
|
|
|
local envfrom_mime = task:get_from(2)
|
|
local from_name = ""
|
|
if envfrom_mime and envfrom_mime[1].name then
|
|
from_name = envfrom_mime[1].name
|
|
elseif envfrom and envfrom[1].name then
|
|
from_name = envfrom[1].name
|
|
end
|
|
|
|
-- default replacements
|
|
local replacements = {
|
|
auth_user = uname,
|
|
from_user = envfrom[1].user,
|
|
from_name = from_name,
|
|
from_addr = envfrom[1].addr,
|
|
from_domain = envfrom[1].domain:lower()
|
|
}
|
|
-- add custom mailbox attributes
|
|
if footer.vars and type(footer.vars) == "string" then
|
|
local footer_vars = cjson.decode(footer.vars)
|
|
|
|
if type(footer_vars) == "table" then
|
|
for key, value in pairs(footer_vars) do
|
|
replacements[key] = value
|
|
end
|
|
end
|
|
end
|
|
if footer.html and footer.html ~= "" then
|
|
footer.html = lua_util.jinja_template(footer.html, replacements, true)
|
|
end
|
|
if footer.plain and footer.plain ~= "" then
|
|
footer.plain = lua_util.jinja_template(footer.plain, replacements, true)
|
|
end
|
|
|
|
-- add footer
|
|
local out = {}
|
|
local rewrite = lua_mime.add_text_footer(task, footer.html, footer.plain) or {}
|
|
|
|
local seen_cte
|
|
local newline_s = newline(task)
|
|
|
|
local function rewrite_ct_cb(name, hdr)
|
|
if rewrite.need_rewrite_ct then
|
|
if name:lower() == 'content-type' then
|
|
local nct = string.format('%s: %s/%s; charset=utf-8',
|
|
'Content-Type', rewrite.new_ct.type, rewrite.new_ct.subtype)
|
|
out[#out + 1] = nct
|
|
return
|
|
elseif name:lower() == 'content-transfer-encoding' then
|
|
out[#out + 1] = string.format('%s: %s',
|
|
'Content-Transfer-Encoding', 'quoted-printable')
|
|
seen_cte = true
|
|
return
|
|
end
|
|
end
|
|
out[#out + 1] = hdr.raw:gsub('\r?\n?$', '')
|
|
end
|
|
|
|
task:headers_foreach(rewrite_ct_cb, {full = true})
|
|
|
|
if not seen_cte and rewrite.need_rewrite_ct then
|
|
out[#out + 1] = string.format('%s: %s', 'Content-Transfer-Encoding', 'quoted-printable')
|
|
end
|
|
|
|
-- End of headers
|
|
out[#out + 1] = newline_s
|
|
|
|
if rewrite.out then
|
|
for _,o in ipairs(rewrite.out) do
|
|
out[#out + 1] = o
|
|
end
|
|
else
|
|
out[#out + 1] = task:get_rawbody()
|
|
end
|
|
local out_parts = {}
|
|
for _,o in ipairs(out) do
|
|
if type(o) ~= 'table' then
|
|
out_parts[#out_parts + 1] = o
|
|
out_parts[#out_parts + 1] = newline_s
|
|
else
|
|
local removePrefix = "--\x0D\x0AContent-Type"
|
|
if string.lower(string.sub(tostring(o[1]), 1, string.len(removePrefix))) == string.lower(removePrefix) then
|
|
o[1] = string.sub(tostring(o[1]), string.len("--\x0D\x0A") + 1)
|
|
end
|
|
out_parts[#out_parts + 1] = o[1]
|
|
if o[2] then
|
|
out_parts[#out_parts + 1] = newline_s
|
|
end
|
|
end
|
|
end
|
|
task:set_message(out_parts)
|
|
else
|
|
rspamd_logger.infox(rspamd_config, "domain wide footer request for user %s returned invalid or empty data (\"%s\")", uname, data)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
-- fetch footer
|
|
rspamd_http.request({
|
|
task=task,
|
|
url='http://nginx:8081/footer.php',
|
|
body='',
|
|
callback=footer_cb,
|
|
headers={Domain=env_from_domain,Username=uname,From=env_from_addr},
|
|
})
|
|
|
|
return true
|
|
end,
|
|
priority = 1
|
|
})
|