いくつかのExchangeの前に、Postfix + BitDefenderFRAMSを衛生ゲートウェイとして実行しています。 BD FRAMSは、専用のメールボックスからSPAMおよびHAMの電子メールをダウンロードすることにより、そのBaesianフィルターを学習できます。未知の受信者へのSPAMの継続的な流れがあるため、この有用なSPAM電子メールのソースをSPAM学習メールボックスに直接リダイレクトすることを考えています。
私の設定:
main.cf:
myhostname = posfix.example.com
smtpd_banner = $myhostname
#myorigin = example.com
mydestination =
local_recipient_maps =
#virtual_alias_maps = hash:/etc/postfix/virtual
local_transport = error:local mail delivery is disabled
mynetworks = /etc/postfix/mynetworks
smtpd_use_tls = yes
#smtpd_tls_auth_only = yes
smtpd_tls_key_file = /etc/ssl/certs/posfix.example.com.pem
smtpd_tls_cert_file = /etc/ssl/certs/posfix.example.com.pem
smtpd_tls_CApath = /etc/ssl/certs
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
relay_domains = mysql:/etc/postfix/relay_domains
transport_maps = mysql:/etc/postfix/transport
relay_recipient_maps = mysql:/etc/postfix/relay_recipient_maps
show_user_unknown_table_name = no
unknown_local_recipient_reject_code = 550
mailbox_size_limit = 102400000000
message_size_limit = 102400000
smtpd_delay_reject = yes
smtpd_helo_required = yes
#smtpd_helo_restrictions =
# permit_mynetworks
# reject_invalid_hostname
# permit
smtpd_restriction_classes = verify_sender
verify_sender =
reject_unverified_sender
smtpd_sender_restrictions =
permit_mynetworks
smtpd_recipient_restrictions =
reject_unknown_recipient_domain
reject_non_fqdn_recipient
permit_mynetworks
reject_authenticated_sender_login_mismatch
reject_unauth_destination
check_recipient_access hash:/etc/postfix/recipient_access
check_sender_access hash:/etc/postfix/sender_access
#check_helo_access pcre:/etc/postfix/helo_access
reject_non_fqdn_sender
reject_unknown_sender_domain
reject_unlisted_sender
reject_invalid_hostname
reject_unauth_pipelining
check_sender_mx_access cidr:/etc/postfix/sender_mx_access
#reject_non_fqdn_hostname
#reject_unverified_sender
#reject_multi_recipient_bounce
permit
#smtpd_data_restrictions =
#reject_multi_recipient_bounce
# Added by BitDefender on Mon Nov 3 15:27:43 EET 2014
smtpd_milters=unix:/var/spool/postfix/BitDefender/bdmilterd.sock
milter_protocol = 2
milter_default_action = tempfail
milter_connect_timeout = 30s
milter_command_timeout = 30s
milter_content_timeout = 30s
# End of added lines
/ etc/postfix/repository_domains:
user = postfix
password = postfix
dbname = postfix
query = SELECT name FROM relay_domains WHERE name='%s'
/ etc/postfix/transport:
user = postfix
password = postfix
dbname = postfix
query = SELECT nexthop FROM relay_domains WHERE name='%s'
/ etc/postfix/repository_recipient_maps:
user = postfix
password = postfix
dbname = postfix
query = SELECT email FROM relay_users WHERE email='%s'
cron用のAD(親切に共有)のfillrelay-usersのスクリプト:
#!/usr/bin/python
__author__ = 'tiv'
import ldap
import MySQLdb
connections = {
1: ['dc.example.com', # AD domain controller
'EXAMPLE\\user', # AD user
'password', # AD user password
'dc=example, dc=local', # AD root DN
'mail.example.com'], # Exchange server
2: ['dc.example1.com', # AD domain controller
'EXAMPLE1\\user', # AD user
'password', # AD user password
'dc=example1, dc=local', # AD root DN
'mail.example1.com'], # Exchange server
#3: 'dc.example2.com', # AD domain controller
# 'EXAMPLE2\\user', # AD user
# 'password', # AD user password
# 'dc=example2, dc=local', # AD root DN
# 'mail.example2.com'], # Exchange server
}
mysql = ['localhost', # Host
'postfix', # user
'postfix', # password
'postfix'] # schema
def main():
try:
emails = []
domains = []
for i in connections:
connection = connections[i]
print('Processing LDAP server ' + connection[0] + ':')
basedn = connections[i][3]
nexthop = connections[i][4]
lc = ldapconnection(connection)
ls = ldapsearch(lc, basedn)
rl = resultlist(ls)
emails.extend(rl[0])
for domain in rl[1]:
domains.append([domain, nexthop])
print('Processing of LDAP server ' + connection[0] + ' completed.')
createdb(emails, domains, mysql)
print('Operation completed successfully!')
except:
print('Error processing of LDAP server ' + connection[0] + '!')
pass
def ldapconnection(ldapserver):
try:
print(' Trying to connect to LDAP server ' + ldapserver[0] + '...')
ldapconnection = ldap.initialize('ldap://' + ldapserver[0])
ldapconnection.simple_bind_s(ldapserver[1], ldapserver[2])
ldapconnection.protocol_version = ldap.VERSION3
ldapconnection.set_option(ldap.OPT_REFERRALS, 0)
print(' Connection to LDAP server ' + ldapserver[0] + ' succesfull.')
except:
print('Error connecting to LDAP server ' + ldapserver[0] + '!')
pass
return ldapconnection
def ldapsearch(ldapconnection, basedn):
try:
print(' Sending LDAP query request...')
scope = ldap.SCOPE_SUBTREE
filter = '(&(proxyAddresses=smtp:*)(!(objectClass=contact)))'
attributes = ['proxyAddresses']
searchresults = ldapconnection.search_s(basedn, scope, filter, attributes)
print(' LDAP query request results received.')
except:
print('Error sending LDAP query request!')
pass
return searchresults
def resultlist(searchresults):
try:
print(' Processing LDAP query results...')
emails = []
domains = []
for i in range(len(searchresults)):
try:
for j in range(len(searchresults[i][1]['proxyAddresses'])):
r = searchresults[i][1]['proxyAddresses'][j].lower()
if 'smtp:' in r:
email = r[5:]
emails.append(email)
domain = email.split("@")[1]
domains.append(domain)
except:
pass
print(' LDAP query results processed.')
except:
print('Error processing LDAP query results!')
pass
return removedublicates(emails), removedublicates(domains)
def createdb(emails, domains, mysql):
try:
print('Connecting to DB ' + mysql[3] + '...')
try:
db = MySQLdb.connect(Host=mysql[0], user=mysql[1], passwd=mysql[2])
cursor = db.cursor()
sql = 'CREATE SCHEMA IF NOT EXISTS ' + mysql[3]
cursor.execute(sql)
db.commit()
except:
pass
try:
db = MySQLdb.connect(Host=mysql[0], user=mysql[1], passwd=mysql[2], db=mysql[3])
cursor = db.cursor()
except:
print('Error connecting to DB ' + mysql[3] + '!')
print(' Check schemas and tables...')
sql = ['CREATE TABLE IF NOT EXISTS ' + mysql[3] + '.relay_users (id INT NOT NULL, email LONGTEXT NULL, PRIMARY KEY (id))',
'CREATE TABLE IF NOT EXISTS ' + mysql[3] + '.relay_domains (id INT NOT NULL, name LONGTEXT NULL, nexthop LONGTEXT NULL, PRIMARY KEY (id))',
'TRUNCATE ' + mysql[3] + '.relay_users',
'TRUNCATE ' + mysql[3] + '.relay_domains']
for i in range(len(sql)):
cursor.execute(sql[i])
db.commit()
print(' Inserting domains...')
for i in range(len(domains)):
sql = 'INSERT INTO postfix.relay_domains (id, name, nexthop)' \
'VALUES ("' + str(i) + '", "' + domains[i][0] + '", "smtp:[' + domains[i][1] + ']")'
cursor.execute(sql)
db.commit()
print(' Inserting emails...')
for i in range(len(emails)):
sql = 'INSERT INTO postfix.relay_users (id, email)' \
'VALUES ("' + str(i) + '", "' + emails[i] + '")'
cursor.execute(sql)
db.commit()
db.close()
print('Connection to DB ' + mysql[3] + ' closed.')
except:
print('Error while operating with DB ' + mysql[3] + '!')
pass
def removedublicates(input):
seen = set()
seen_add = seen.add
return [x for x in input if not (x in seen or seen_add(x))]
if __name__ == '__main__':
main()
誰かがこれを行う方法を知っているなら、私は感謝します。ありがとう。
この問題のため、あなたの要求は少し複雑です。 Postfixは、設計上、マップからの肯定的な結果に基づいて何かを実行します。たとえば、transport_maps
では、受信者がマップルックアップの結果が良好な場合、特定のホストに電子メールを送信します。ただし、relay_recipient_maps
ルックアップから否定的な結果が出た場合は、何かを実行したい(別のメールボックスにリダイレクトしたい)。マップの種類はハッシュ、他に方法はないと思いますマップに負の結果ロジックを実装するためのsql/tcpマップを含まない限り。
SQLソリューションの場合、ここにアイデアがあります:
この例では、sqliteを使用します。 Relay_recipientという名前の1つの列を持つテーブルがあるとします。今クエリ
select ifnull(select relay_recipient from mytable WHERE relay_recipient = %s, '[email protected]')
受信者がrelay_recipient_mapsに存在しない場合は常に、[email protected]
を返します。それらのマップをvirtual_alias
パラメーターに配置します。その後、不明なユーザーに電子メールが送信されるたびに、mailboxspam @ example.comにエイリアスされます。
@ tmpl7の+1は、sqliteを使用してシナリオを実装する方法について素晴らしいアイデアを持っています
ここでの問題は、virtual_alias_maps
パラメーターにifnullのSQLクエリを実装していないことです。まず、virtual_alias_maps
でmain.cf
を定義します
virtual_alias_maps = mysql:/etc/postfix/redirect2spamlearning
/etc/postfix/redirect2spamlearning
の内容
user = postfix
password = postfix
dbname = postfix
query = SELECT IFNULL((SELECT email FROM relay_users WHERE email='%s'), '[email protected]')
ロジックは次のとおりです。SELECT email FROM relay_users WHERE email='%s'
がnull値とも呼ばれるものを返さない場合、電子メールは[email protected]にリダイレクトされます。