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-- Module for checking mail list headers
local symbol = 'MAILLIST'
-- EZMLM
-- Mailing-List: .*run by ezmlm
-- Precedence: bulk
-- List-Post: <mailto:
-- List-Help: <mailto:
-- List-Unsubscribe: <mailto:[a-zA-Z\.-]+-unsubscribe@
-- List-Subscribe: <mailto:[a-zA-Z\.-]+-subscribe@
function check_ml_ezmlm(task)
local message = task:get_message()
-- Mailing-List
local header = message:get_header('mailing-list')
if not header or not string.find(header[1], 'ezmlm$') then
return false
end
-- Precedence
header = message:get_header('precedence')
if not header or not string.match(header[1], '^bulk$') then
return false
end
-- Other headers
header = message:get_header('list-post')
if not header or not string.find(header[1], '^<mailto:') then
return false
end
header = message:get_header('list-help')
if not header or not string.find(header[1], '^<mailto:') then
return false
end
-- Subscribe and unsubscribe
header = message:get_header('list-subscribe')
if not header or not string.find(header[1], '<mailto:[a-zA-Z.-]+-subscribe@') then
return false
end
header = message:get_header('list-unsubscribe')
if not header or not string.find(header[1], '<mailto:[a-zA-Z.-]+-unsubscribe@') then
return false
end
return true
end
-- MailMan (the gnu mailing list manager)
-- Precedence: bulk [or list for v2]
-- List-Help: <mailto:
-- List-Post: <mailto:
-- List-Subscribe: .*<mailto:.*=subscribe>
-- List-Id:
-- List-Unsubscribe: .*<mailto:.*=unsubscribe>
-- List-Archive:
-- X-Mailman-Version: \d
function check_ml_mailman(task)
local message = task:get_message()
-- Mailing-List
local header = message:get_header('x-mailman-version')
if not header or not string.find(header[1], '^%d') then
return false
end
-- Precedence
header = message:get_header('precedence')
if not header or (not string.match(header[1], '^bulk$') and not string.match(header[1], '^list$')) then
return false
end
-- For reminders we have other headers than for normal messages
header = message:get_header('x-list-administrivia')
local subject = message:get_header('subject')
if (header and string.find(header[1], 'yes')) or (subject and string.find(subject[1], 'mailing list memberships reminder$')) then
if not message:get_header('errors-to') or not message:get_header('x-beenthere') then
return false
end
header = message:get_header('x-no-archive')
if not header or not string.find(header[1], 'yes') then
return false
end
return true
end
-- Other headers
header = message:get_header('list-id')
if not header then
return false
end
header = message:get_header('list-post')
if not header or not string.find(header[1], '^<mailto:') then
return false
end
header = message:get_header('list-help')
if not header or not string.find(header[1], '^<mailto:') then
return false
end
-- Subscribe and unsubscribe
header = message:get_header('list-subscribe')
if not header or not string.find(header[1], '<mailto:.*=subscribe>') then
return false
end
header = message:get_header('list-unsubscribe')
if not header or not string.find(header[1], '<mailto:.*=unsubscribe>') then
return false
end
return true
end
-- Subscribe.ru
-- Precedence: normal
-- List-Id: <.*.subscribe.ru>
-- List-Help: <http://subscribe.ru/catalog/.*>
-- List-Subscribe: <mailto:.*-sub@subscribe.ru>
-- List-Unsubscribe: <mailto:.*-unsub@subscribe.ru>
-- List-Archive: <http://subscribe.ru/archive/.*>
-- List-Owner: <mailto:.*-owner@subscribe.ru>
-- List-Post: NO
function check_ml_subscriberu(task)
local message = task:get_message()
-- List-Id
local header = message:get_header('list-id')
if not header or not string.find(header[1], '^<.*%.subscribe%.ru>$') then
return false
end
-- Precedence
header = message:get_header('precedence')
if not header or not string.match(header[1], '^normal$') then
return false
end
-- Other headers
header = message:get_header('list-archive')
if not header or not string.find(header[1], '^<http://subscribe.ru/archive/.*>$') then
return false
end
header = message:get_header('list-owner')
if not header or not string.find(header[1], '^<mailto:.*-owner@subscribe.ru>$') then
return false
end
header = message:get_header('list-help')
if not header or not string.find(header[1], '^<http://subscribe.ru/catalog/.*>$') then
return false
end
-- Subscribe and unsubscribe
header = message:get_header('list-subscribe')
if not header or not string.find(header[1], '^<mailto:.*-sub@subscribe.ru>$') then
return false
end
header = message:get_header('list-unsubscribe')
if not header or not string.find(header[1], '^<mailto:.*-unsub@subscribe.ru>$') then
return false
end
return true
end
-- RFC 2369 headers
function check_rfc2369(task)
local message = task:get_message()
local header = message:get_header('List-Id')
if not header then
return false
end
header = message:get_header('List-Unsubscribe')
if not header or not string.find(header[1], '^^<.+>$') then
return false
end
header = message:get_header('List-Subscribe')
if not header or not string.find(header[1], '^^<.+>$') then
return false
end
return true
end
-- RFC 2919 headers
function check_rfc2919(task)
local message = task:get_message()
local header = message:get_header('List-Id')
if not header or not string.find(header[1], '^<.+>$') then
return false
end
return check_rfc2369(task)
end
-- Google groups detector
-- header exists X-Google-Loop
-- RFC 2919 headers exist
--
function check_ml_googlegroup(task)
local message = task:get_message()
local header = message:get_header('X-Google-Loop')
if not header then
return false
end
return check_rfc2919(task)
end
-- Majordomo detector
-- Check Sender for owner- or -owner
-- Check Precendence for 'Bulk' or 'List'
--
-- And nothing more can be extracted :(
function check_ml_majordomo(task)
local message = task:get_message()
local header = message:get_header('Sender')
if not header or (not string.find(header[1], '^owner-.*$') and not string.find(header[1], '^.*-owner$')) then
return false
end
local header = message:get_header('Precedence')
if not header or (header[1] ~= 'list' and header[1] ~= 'bulk') then
return false
end
return true
end
-- CGP detector
-- X-Listserver = CommuniGate Pro LIST
-- RFC 2919 headers exist
--
function check_ml_cgp(task)
local message = task:get_message()
local header = message:get_header('X-Listserver')
if not header or header ~= 'CommuniGate Pro LIST' then
return false
end
return check_rfc2919(task)
end
function check_maillist(task)
if check_ml_ezmlm(task) then
task:insert_result(symbol, 1, 'ezmlm')
elseif check_ml_mailman(task) then
task:insert_result(symbol, 1, 'mailman')
elseif check_ml_subscriberu(task) then
task:insert_result(symbol, 1, 'subscribe.ru')
elseif check_ml_googlegroup(task) then
task:insert_result(symbol, 1, 'googlegroups')
elseif check_ml_majordomo(task) then
task:insert_result(symbol, 1, 'majordomo')
elseif check_ml_cgp(task) then
task:insert_result(symbol, 1, 'cgp')
end
end
-- Registration
if type(rspamd_config.get_api_version) ~= 'nil' then
if rspamd_config:get_api_version() >= 1 then
rspamd_config:register_module_option('maillist', 'symbol', 'string')
end
end
-- Configuration
local opts = rspamd_config:get_all_opt('maillist')if opts then
if opts['symbol'] then
symbol = opts['symbol']
rspamd_config:register_symbol(symbol, 1.0, 'check_maillist')
end
end
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