blob: b007f097e476d4d25a98f78a07e4c58b37a9ee29 [file] [log] [blame]
-- Load sendgrid ID validator, thanks to https://github.com/fatalbanana
local rspamd_util = require 'rspamd_util'
local f = '/etc/rspamd/lua/ivm-sg.lua'
if rspamd_util.file_exists(f) then
dofile(f)
end
rspamd_config.MAILCOW_AUTH = {
callback = function(task)
local uname = task:get_user()
if uname then
return 1
end
end
}
local monitoring_hosts = rspamd_config:add_map{
url = "/etc/rspamd/custom/monitoring_nolog.map",
description = "Monitoring hosts",
type = "regexp"
}
rspamd_config:register_symbol({
name = 'SMTP_ACCESS',
type = 'postfilter',
callback = function(task)
local util = require("rspamd_util")
local rspamd_logger = require "rspamd_logger"
local rspamd_ip = require 'rspamd_ip'
local uname = task:get_user()
local limited_access = task:get_symbol("SMTP_LIMITED_ACCESS")
if not uname then
return false
end
if not limited_access then
return false
end
local hash_key = 'SMTP_ALLOW_NETS_' .. uname
local redis_params = rspamd_parse_redis_server('smtp_access')
local ip = task:get_from_ip()
if ip == nil or not ip:is_valid() then
return false
end
local from_ip_string = tostring(ip)
smtp_access_table = {from_ip_string}
local maxbits = 128
local minbits = 32
if ip:get_version() == 4 then
maxbits = 32
minbits = 8
end
for i=maxbits,minbits,-1 do
local nip = ip:apply_mask(i):to_string() .. "/" .. i
table.insert(smtp_access_table, nip)
end
local function smtp_access_cb(err, data)
if err then
rspamd_logger.infox(rspamd_config, "smtp_access query request for ip %s returned invalid or empty data (\"%s\") or error (\"%s\")", ip, data, err)
return false
else
rspamd_logger.infox(rspamd_config, "checking ip %s for smtp_access in %s", from_ip_string, hash_key)
for k,v in pairs(data) do
if (v and v ~= userdata and v == '1') then
rspamd_logger.infox(rspamd_config, "found ip in smtp_access map")
task:insert_result(true, 'SMTP_ACCESS', 0.0, from_ip_string)
return true
end
end
rspamd_logger.infox(rspamd_config, "couldnt find ip in smtp_access map")
task:insert_result(true, 'SMTP_ACCESS', 999.0, from_ip_string)
return true
end
end
table.insert(smtp_access_table, 1, hash_key)
local redis_ret_user = rspamd_redis_make_request(task,
redis_params, -- connect params
hash_key, -- hash key
false, -- is write
smtp_access_cb, --callback
'HMGET', -- command
smtp_access_table -- arguments
)
if not redis_ret_user then
rspamd_logger.infox(rspamd_config, "cannot check smtp_access redis map")
end
end,
priority = 10
})
rspamd_config:register_symbol({
name = 'POSTMASTER_HANDLER',
type = 'prefilter',
callback = function(task)
local rcpts = task:get_recipients('smtp')
local rspamd_logger = require "rspamd_logger"
local lua_util = require "lua_util"
local from = task:get_from(1)
-- not applying to mails with more than one rcpt to avoid bypassing filters by addressing postmaster
if rcpts and #rcpts == 1 then
for _,rcpt in ipairs(rcpts) do
local rcpt_split = rspamd_str_split(rcpt['addr'], '@')
if #rcpt_split == 2 then
if rcpt_split[1] == 'postmaster' then
task:set_pre_result('accept', 'whitelisting postmaster smtp rcpt')
return
end
end
end
end
if from then
for _,fr in ipairs(from) do
local fr_split = rspamd_str_split(fr['addr'], '@')
if #fr_split == 2 then
if fr_split[1] == 'postmaster' and task:get_user() then
-- no whitelist, keep signatures
task:insert_result(true, 'POSTMASTER_FROM', -2500.0)
return
end
end
end
end
end,
priority = 10
})
rspamd_config:register_symbol({
name = 'KEEP_SPAM',
type = 'prefilter',
callback = function(task)
local util = require("rspamd_util")
local rspamd_logger = require "rspamd_logger"
local rspamd_ip = require 'rspamd_ip'
local uname = task:get_user()
if uname then
return false
end
local redis_params = rspamd_parse_redis_server('keep_spam')
local ip = task:get_from_ip()
if ip == nil or not ip:is_valid() then
return false
end
local from_ip_string = tostring(ip)
ip_check_table = {from_ip_string}
local maxbits = 128
local minbits = 32
if ip:get_version() == 4 then
maxbits = 32
minbits = 8
end
for i=maxbits,minbits,-1 do
local nip = ip:apply_mask(i):to_string() .. "/" .. i
table.insert(ip_check_table, nip)
end
local function keep_spam_cb(err, data)
if err then
rspamd_logger.infox(rspamd_config, "keep_spam query request for ip %s returned invalid or empty data (\"%s\") or error (\"%s\")", ip, data, err)
return false
else
for k,v in pairs(data) do
if (v and v ~= userdata and v == '1') then
rspamd_logger.infox(rspamd_config, "found ip in keep_spam map, setting pre-result")
task:set_pre_result('accept', 'ip matched with forward hosts')
end
end
end
end
table.insert(ip_check_table, 1, 'KEEP_SPAM')
local redis_ret_user = rspamd_redis_make_request(task,
redis_params, -- connect params
'KEEP_SPAM', -- hash key
false, -- is write
keep_spam_cb, --callback
'HMGET', -- command
ip_check_table -- arguments
)
if not redis_ret_user then
rspamd_logger.infox(rspamd_config, "cannot check keep_spam redis map")
end
end,
priority = 19
})
rspamd_config:register_symbol({
name = 'TLS_HEADER',
type = 'postfilter',
callback = function(task)
local rspamd_logger = require "rspamd_logger"
local tls_tag = task:get_request_header('TLS-Version')
if type(tls_tag) == 'nil' then
task:set_milter_reply({
add_headers = {['X-Last-TLS-Session-Version'] = 'None'}
})
else
task:set_milter_reply({
add_headers = {['X-Last-TLS-Session-Version'] = tostring(tls_tag)}
})
end
end,
priority = 12
})
rspamd_config:register_symbol({
name = 'TAG_MOO',
type = 'postfilter',
callback = function(task)
local util = require("rspamd_util")
local rspamd_logger = require "rspamd_logger"
local redis_params = rspamd_parse_redis_server('taghandler')
local rspamd_http = require "rspamd_http"
local rcpts = task:get_recipients('smtp')
local lua_util = require "lua_util"
local tagged_rcpt = task:get_symbol("TAGGED_RCPT")
local mailcow_domain = task:get_symbol("RCPT_MAILCOW_DOMAIN")
if tagged_rcpt and tagged_rcpt[1].options and mailcow_domain then
local tag = tagged_rcpt[1].options[1]
rspamd_logger.infox("found tag: %s", tag)
local action = task:get_metric_action('default')
rspamd_logger.infox("metric action now: %s", action)
if action ~= 'no action' and action ~= 'greylist' then
rspamd_logger.infox("skipping tag handler for action: %s", action)
return true
end
local function http_callback(err_message, code, body, headers)
if body ~= nil and body ~= "" then
rspamd_logger.infox(rspamd_config, "expanding rcpt to \"%s\"", body)
local function tag_callback_subject(err, data)
if err or type(data) ~= 'string' then
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)
local function tag_callback_subfolder(err, data)
if err or type(data) ~= 'string' then
rspamd_logger.infox(rspamd_config, "subfolder tag handler for rcpt %s returned invalid or empty data (\"%s\") or error (\"%s\")", body, data, err)
else
rspamd_logger.infox("Add X-Moo-Tag header")
task:set_milter_reply({
add_headers = {['X-Moo-Tag'] = 'YES'}
})
end
end
local redis_ret_subfolder = rspamd_redis_make_request(task,
redis_params, -- connect params
body, -- hash key
false, -- is write
tag_callback_subfolder, --callback
'HGET', -- command
{'RCPT_WANTS_SUBFOLDER_TAG', body} -- arguments
)
if not redis_ret_subfolder then
rspamd_logger.infox(rspamd_config, "cannot make request to load tag handler for rcpt")
end
else
rspamd_logger.infox("user wants subject modified for tagged mail")
local sbj = task:get_header('Subject')
new_sbj = '=?UTF-8?B?' .. tostring(util.encode_base64('[' .. tag .. '] ' .. sbj)) .. '?='
task:set_milter_reply({
remove_headers = {['Subject'] = 1},
add_headers = {['Subject'] = new_sbj}
})
end
end
local redis_ret_subject = rspamd_redis_make_request(task,
redis_params, -- connect params
body, -- hash key
false, -- is write
tag_callback_subject, --callback
'HGET', -- command
{'RCPT_WANTS_SUBJECT_TAG', body} -- arguments
)
if not redis_ret_subject then
rspamd_logger.infox(rspamd_config, "cannot make request to load tag handler for rcpt")
end
end
end
if rcpts and #rcpts == 1 then
for _,rcpt in ipairs(rcpts) do
local rcpt_split = rspamd_str_split(rcpt['addr'], '@')
if #rcpt_split == 2 then
if rcpt_split[1] == 'postmaster' then
rspamd_logger.infox(rspamd_config, "not expanding postmaster alias")
else
rspamd_http.request({
task=task,
url='http://nginx:8081/aliasexp.php',
body='',
callback=http_callback,
headers={Rcpt=rcpt['addr']},
})
end
end
end
end
end
end,
priority = 19
})
rspamd_config:register_symbol({
name = 'BCC',
type = 'postfilter',
callback = function(task)
local util = require("rspamd_util")
local rspamd_http = require "rspamd_http"
local rspamd_logger = require "rspamd_logger"
local from_table = {}
local rcpt_table = {}
if task:has_symbol('ENCRYPTED_CHAT') then
return -- stop
end
local send_mail = function(task, bcc_dest)
local lua_smtp = require "lua_smtp"
local function sendmail_cb(ret, err)
if not ret then
rspamd_logger.errx(task, 'BCC SMTP ERROR: %s', err)
else
rspamd_logger.infox(rspamd_config, "BCC SMTP SUCCESS TO %s", bcc_dest)
end
end
if not bcc_dest then
return -- stop
end
lua_smtp.sendmail({
task = task,
host = os.getenv("IPV4_NETWORK") .. '.253',
port = 591,
from = task:get_from(stp)[1].addr,
recipients = bcc_dest,
helo = 'bcc',
timeout = 10,
}, task:get_content(), sendmail_cb)
end
-- determine from
local from = task:get_from('smtp')
if from then
for _, a in ipairs(from) do
table.insert(from_table, a['addr']) -- add this rcpt to table
table.insert(from_table, '@' .. a['domain']) -- add this rcpts domain to table
end
else
return -- stop
end
-- determine rcpts
local rcpts = task:get_recipients('smtp')
if rcpts then
for _, a in ipairs(rcpts) do
table.insert(rcpt_table, a['addr']) -- add this rcpt to table
table.insert(rcpt_table, '@' .. a['domain']) -- add this rcpts domain to table
end
else
return -- stop
end
local action = task:get_metric_action('default')
rspamd_logger.infox("metric action now: %s", action)
local function rcpt_callback(err_message, code, body, headers)
if err_message == nil and code == 201 and body ~= nil then
if action == 'no action' or action == 'add header' or action == 'rewrite subject' then
send_mail(task, body)
end
end
end
local function from_callback(err_message, code, body, headers)
if err_message == nil and code == 201 and body ~= nil then
if action == 'no action' or action == 'add header' or action == 'rewrite subject' then
send_mail(task, body)
end
end
end
if rcpt_table then
for _,e in ipairs(rcpt_table) do
rspamd_logger.infox(rspamd_config, "checking bcc for rcpt address %s", e)
rspamd_http.request({
task=task,
url='http://nginx:8081/bcc.php',
body='',
callback=rcpt_callback,
headers={Rcpt=e}
})
end
end
if from_table then
for _,e in ipairs(from_table) do
rspamd_logger.infox(rspamd_config, "checking bcc for from address %s", e)
rspamd_http.request({
task=task,
url='http://nginx:8081/bcc.php',
body='',
callback=from_callback,
headers={From=e}
})
end
end
return true
end,
priority = 20
})
rspamd_config:register_symbol({
name = 'DYN_RL_CHECK',
type = 'prefilter',
callback = function(task)
local util = require("rspamd_util")
local redis_params = rspamd_parse_redis_server('dyn_rl')
local rspamd_logger = require "rspamd_logger"
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() -- get smtp from domain in lower case
local function redis_cb_user(err, data)
if err or type(data) ~= 'string' then
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)
local function redis_key_cb_domain(err, data)
if err or type(data) ~= 'string' then
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)
else
rspamd_logger.infox(rspamd_config, "found dynamic ratelimit in redis for domain %s with value %s", env_from_domain, data)
task:insert_result('DYN_RL', 0.0, data, env_from_domain)
end
end
local redis_ret_domain = rspamd_redis_make_request(task,
redis_params, -- connect params
env_from_domain, -- hash key
false, -- is write
redis_key_cb_domain, --callback
'HGET', -- command
{'RL_VALUE', env_from_domain} -- arguments
)
if not redis_ret_domain then
rspamd_logger.infox(rspamd_config, "cannot make request to load ratelimit for domain")
end
else
rspamd_logger.infox(rspamd_config, "found dynamic ratelimit in redis for user %s with value %s", uname, data)
task:insert_result('DYN_RL', 0.0, data, uname)
end
end
local redis_ret_user = rspamd_redis_make_request(task,
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) then
task:set_flag('no_log')
task:set_flag('no_stat')
end
end
})