IP blacklisted

Discussion in 'Installation/Configuration' started by chief, Apr 22, 2022.

  1. chief

    chief Member HowtoForge Supporter

    ISPCONFIG 3.2.7p1
    Debian 11 (bullseye)
    None of my servers are black listed, all names are fine.
    My issue is, some clients when sending email using outlook, they are being bounced back stating
    Code:
    mailgate.....[ip.ip.ip.ip] said: 550 5.7.1
    xx.xx.xx.xx listed at zen.spamhaus.org (in reply to end of DATA command)
    The ip xx.xx.xx.xx is my clients starting IP, so their IP at work/home is blacklisted. what do i need to alter to not have their original IP, so it just shows the mail server IP as a originating point?

    thanks

    dave
     
  2. Jesse Norell

    Jesse Norell ISPConfig Developer Staff Member ISPConfig Developer

    They are likely sending on the wrong port (25), they need to use 465 or 587.
     
  3. Jesse Norell

    Jesse Norell ISPConfig Developer Staff Member ISPConfig Developer

    On further thought, the default rbl is not implemented at end-of-data, so not sure what you have going on here. What is a full set of logs from when such a client attempts to send? And post your 'postconf -n' output and master.cf.
     
  4. chief

    chief Member HowtoForge Supporter

    they are sending 993/465
     
  5. chief

    chief Member HowtoForge Supporter

    postconf -n
    Code:
    [email protected]:~# postconf -n
    address_verify_negative_refresh_time = 60s
    address_verify_sender_ttl = 15686s
    alias_database = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases
    alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases
    append_dot_mydomain = no
    biff = no
    body_checks = regexp:/etc/postfix/body_checks
    broken_sasl_auth_clients = yes
    compatibility_level = 2
    dovecot_destination_recipient_limit = 1
    enable_original_recipient = no
    greylisting = check_policy_service inet:127.0.0.1:10023
    header_checks = regexp:/etc/postfix/header_checks
    html_directory = /usr/share/doc/postfix/html
    inet_interfaces = all
    inet_protocols = all
    mailbox_size_limit = 0
    maildrop_destination_concurrency_limit = 1
    maildrop_destination_recipient_limit = 1
    message_size_limit = 0
    milter_default_action = accept
    milter_mail_macros = i {mail_addr} {client_addr} {client_name} {auth_authen}
    milter_protocol = 6
    mime_header_checks = regexp:/etc/postfix/mime_header_checks
    mydestination = mx1.tlwebservices.co.uk, localhost, localhost.localdomain
    myhostname = mx1.tlwebservices.co.uk
    mynetworks = 127.0.0.0/8 [::1]/128
    myorigin = /etc/mailname
    nested_header_checks = regexp:/etc/postfix/nested_header_checks
    non_smtpd_milters = inet:localhost:11332
    owner_request_special = no
    proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $sender_bcc_maps $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $smtpd_sender_login_maps $virtual_uid_maps $virtual_gid_maps $smtpd_client_restrictions $smtpd_sender_restrictions $smtpd_recipient_restrictions $smtp_sasl_password_maps $sender_dependent_relayhost_maps
    readme_directory = /usr/share/doc/postfix
    recipient_delimiter = +
    relay_domains = proxy:mysql:/etc/postfix/mysql-virtual_relaydomains.cf
    relay_recipient_maps = proxy:mysql:/etc/postfix/mysql-virtual_relayrecipientmaps.cf
    relayhost =
    sender_bcc_maps = proxy:mysql:/etc/postfix/mysql-virtual_outgoing_bcc.cf
    sender_dependent_relayhost_maps = proxy:mysql:/etc/postfix/mysql-virtual_sender-relayhost.cf
    smtp_dns_support_level = dnssec
    smtp_sasl_auth_enable = yes
    smtp_sasl_password_maps = proxy:mysql:/etc/postfix/mysql-virtual_sender-relayauth.cf, texthash:/etc/postfix/sasl_passwd
    smtp_sasl_security_options = noanonymous, noplaintext
    smtp_sasl_tls_security_options = noanonymous
    smtp_sender_dependent_authentication = yes
    smtp_tls_CApath = /etc/ssl/certs
    smtp_tls_exclude_ciphers = RC4, aNULL
    smtp_tls_protocols = !SSLv2,!SSLv3
    smtp_tls_security_level = dane
    smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
    smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
    smtpd_client_message_rate_limit = 100
    smtpd_client_restrictions = check_client_access proxy:mysql:/etc/postfix/mysql-virtual_client.cf, permit_inet_interfaces, permit_mynetworks, permit_sasl_authenticated, reject_rbl_client zen.spamhaus.org, reject_unauth_pipelining, permit
    smtpd_data_restrictions = permit_mynetworks, reject_unauth_pipelining, reject_multi_recipient_bounce, permit
    smtpd_etrn_restrictions = permit_mynetworks, reject
    smtpd_forbidden_commands = CONNECT,GET,POST,USER,PASS
    smtpd_helo_required = yes
    smtpd_helo_restrictions = permit_mynetworks, check_helo_access regexp:/etc/postfix/helo_access, permit_sasl_authenticated, reject_invalid_helo_hostname, reject_non_fqdn_helo_hostname, check_helo_access regexp:/etc/postfix/blacklist_helo, reject_unknown_helo_hostname, permit
    smtpd_milters = inet:localhost:11332
    smtpd_recipient_restrictions = permit_mynetworks, reject_unknown_recipient_domain, reject_unlisted_recipient, check_recipient_access proxy:mysql:/etc/postfix/mysql-verify_recipients.cf, permit_sasl_authenticated, reject_non_fqdn_recipient, reject_unauth_destination, check_recipient_access proxy:mysql:/etc/postfix/mysql-virtual_recipient.cf, check_recipient_access mysql:/etc/postfix/mysql-virtual_policy_greylist.cf, check_policy_service unix:private/quota-status
    smtpd_reject_unlisted_sender = no
    smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
    smtpd_restriction_classes = greylisting
    smtpd_sasl_auth_enable = yes
    smtpd_sasl_authenticated_header = yes
    smtpd_sasl_path = private/auth
    smtpd_sasl_type = dovecot
    smtpd_sender_login_maps = proxy:mysql:/etc/postfix/mysql-virtual_sender_login_maps.cf
    smtpd_sender_restrictions = check_sender_access proxy:mysql:/etc/postfix/mysql-virtual_sender.cf, permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_sender, reject_unlisted_sender
    smtpd_tls_cert_file = /etc/postfix/smtpd.cert
    smtpd_tls_exclude_ciphers = RC4, aNULL
    smtpd_tls_key_file = /etc/postfix/smtpd.key
    smtpd_tls_mandatory_ciphers = medium
    smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
    smtpd_tls_protocols = !SSLv2,!SSLv3
    smtpd_tls_security_level = may
    smtpd_use_tls = yes
    tls_medium_cipherlist = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA256:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA
    tls_preempt_cipherlist = yes
    transport_maps = hash:/var/lib/mailman/data/transport-mailman, proxy:mysql:/etc/postfix/mysql-virtual_transports.cf
    virtual_alias_domains = proxy:mysql:/etc/postfix/mysql-virtual_alias_domains.cf
    virtual_alias_maps = hash:/var/lib/mailman/data/virtual-mailman, proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, proxy:mysql:/etc/postfix/mysql-virtual_alias_maps.cf, proxy:mysql:/etc/postfix/mysql-virtual_email2email.cf
    virtual_gid_maps = proxy:mysql:/etc/postfix/mysql-virtual_gids.cf
    virtual_mailbox_base = /var/vmail
    virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf
    virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf
    virtual_transport = lmtp:unix:private/dovecot-lmtp
    virtual_uid_maps = proxy:mysql:/etc/postfix/mysql-virtual_uids.cf
    [email protected]:~#
    
    master.cf
    Code:
    #
    # Postfix master process configuration file.  For details on the format
    # of the file, see the master(5) manual page (command: "man 5 master" or
    # on-line: http://www.postfix.org/master.5.html).
    #
    # Do not forget to execute "postfix reload" after editing this file.
    #
    # ==========================================================================
    # service type  private unpriv  chroot  wakeup  maxproc command + args
    #               (yes)   (yes)   (no)    (never) (100)
    # ==========================================================================
    smtp      inet  n       -       y       -       -       smtpd
    #smtp      inet  n       -       y       -       1       postscreen
    #smtpd     pass  -       -       y       -       -       smtpd
    #dnsblog   unix  -       -       y       -       0       dnsblog
    #tlsproxy  unix  -       -       y       -       0       tlsproxy
    submission inet n       -       y       -       -       smtpd
     -o syslog_name=postfix/submission
     -o smtpd_tls_security_level=encrypt
     -o smtpd_sasl_auth_enable=yes
     -o smtpd_client_restrictions=permit_sasl_authenticated,reject
    #  -o syslog_name=postfix/submission
    #  -o smtpd_tls_security_level=encrypt
    #  -o smtpd_sasl_auth_enable=yes
    #  -o smtpd_tls_auth_only=yes
    #  -o smtpd_reject_unlisted_recipient=no
    #  -o smtpd_client_restrictions=$mua_client_restrictions
    #  -o smtpd_helo_restrictions=$mua_helo_restrictions
    #  -o smtpd_sender_restrictions=$mua_sender_restrictions
    #  -o smtpd_recipient_restrictions=
    #  -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
    #  -o milter_macro_daemon_name=ORIGINATING
    smtps     inet  n       -       y       -       -       smtpd
     -o syslog_name=postfix/smtps
     -o smtpd_tls_wrappermode=yes
     -o smtpd_sasl_auth_enable=yes
     -o smtpd_client_restrictions=permit_sasl_authenticated,reject
    #  -o syslog_name=postfix/smtps
    #  -o smtpd_tls_wrappermode=yes
    #  -o smtpd_sasl_auth_enable=yes
    #  -o smtpd_reject_unlisted_recipient=no
    #  -o smtpd_client_restrictions=$mua_client_restrictions
    #  -o smtpd_helo_restrictions=$mua_helo_restrictions
    #  -o smtpd_sender_restrictions=$mua_sender_restrictions
    #  -o smtpd_recipient_restrictions=
    #  -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
    #  -o milter_macro_daemon_name=ORIGINATING
    #628       inet  n       -       y       -       -       qmqpd
    pickup    unix  n       -       y       60      1       pickup
    cleanup   unix  n       -       y       -       0       cleanup
    qmgr      unix  n       -       n       300     1       qmgr
    #qmgr     unix  n       -       n       300     1       oqmgr
    tlsmgr    unix  -       -       y       1000?   1       tlsmgr
    rewrite   unix  -       -       y       -       -       trivial-rewrite
    bounce    unix  -       -       y       -       0       bounce
    defer     unix  -       -       y       -       0       bounce
    trace     unix  -       -       y       -       0       bounce
    verify    unix  -       -       y       -       1       verify
    flush     unix  n       -       y       1000?   0       flush
    proxymap  unix  -       -       n       -       -       proxymap
    proxywrite unix -       -       n       -       1       proxymap
    smtp      unix  -       -       y       -       -       smtp
    relay     unix  -       -       y       -       -       smtp
            -o syslog_name=postfix/$service_name
    #       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
    showq     unix  n       -       y       -       -       showq
    error     unix  -       -       y       -       -       error
    retry     unix  -       -       y       -       -       error
    discard   unix  -       -       y       -       -       discard
    local     unix  -       n       n       -       -       local
    virtual   unix  -       n       n       -       -       virtual
    lmtp      unix  -       -       y       -       -       lmtp
    anvil     unix  -       -       y       -       1       anvil
    scache    unix  -       -       y       -       1       scache
    postlog   unix-dgram n  -       n       -       1       postlogd
    #
    # ====================================================================
    # Interfaces to non-Postfix software. Be sure to examine the manual
    # pages of the non-Postfix software to find out what options it wants.
    #
    # Many of the following services use the Postfix pipe(8) delivery
    # agent.  See the pipe(8) man page for information about ${recipient}
    # and other message envelope options.
    # ====================================================================
    #
    # maildrop. See the Postfix MAILDROP_README file for details.
    # Also specify in main.cf: maildrop_destination_recipient_limit=1
    #
    maildrop  unix  -       n       n       -       -       pipe
      flags=DRXhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
    #
    # ====================================================================
    #
    # Recent Cyrus versions can use the existing "lmtp" master.cf entry.
    #
    # Specify in cyrus.conf:
    #   lmtp    cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4
    #
    # Specify in main.cf one or more of the following:
    #  mailbox_transport = lmtp:inet:localhost
    #  virtual_transport = lmtp:inet:localhost
    #
    # ====================================================================
    #
    # Cyrus 2.1.5 (Amos Gouaux)
    # Also specify in main.cf: cyrus_destination_recipient_limit=1
    #
    #cyrus     unix  -       n       n       -       -       pipe
    #  flags=DRX user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
    #
    # ====================================================================
    # Old example of delivery via Cyrus.
    #
    #old-cyrus unix  -       n       n       -       -       pipe
    #  flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
    #
    # ====================================================================
    #
    # See the Postfix UUCP_README file for configuration details.
    #
    uucp      unix  -       n       n       -       -       pipe
      flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
    #
    # Other external delivery methods.
    #
    ifmail    unix  -       n       n       -       -       pipe
      flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
    bsmtp     unix  -       n       n       -       -       pipe
      flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
    scalemail-backend unix -       n       n       -       2       pipe
      flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
    mailman   unix  -       n       n       -       -       pipe
      flags=FRX user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user}
    dovecot   unix  -       n       n       -       -       pipe
      flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender} -d ${user}@${nexthop}
    
     
  6. recin

    recin Member

    I had the same problem because zen.spamhaus.org include a lot of residential IPs.
    I solved it using sbl.spamhaus.org and xbl.spamhaus.org instead
     
  7. chief

    chief Member HowtoForge Supporter

    Thats good, but the sender is my customer and where the emails are going to are bouncing them away saying "nah. you spam a lot - have a error 550.... blah"
    Code:
     <[email protected]>: host
    (receiving server)mailgate......gov.uk[xx.xx.xx.xx] said 550 5.7.1
    (my customer)xx.xx.xx.xx listed at zen.spamhaus.org (in reply to end of DATA command)[code]
    the first IP at mailgate... is receivers server and last IP is my customer sending.
     
  8. Jesse Norell

    Jesse Norell ISPConfig Developer Staff Member ISPConfig Developer

    Ah, so that message is from an external server, not yours? (Having a full set of logs would be helpful to see what's going on.) It sounds like they simply have a bad filtering setup on their end, as zen (which includes pbl) should never be used like that. You could champion for change, explaining to them their error and trying to get them to fix it; or you could try to kill headers that reveal the client ip (eg. see https://serverfault.com/questions/413533/remove-hide-client-sender-ip-from-postfix); or if the receiving mail system "cares" about the sender for some particular reason, have your customer complain to the receiver about the issue and drive the change from that end.
     
  9. chief

    chief Member HowtoForge Supporter

    That wont work, this is UK local government. you can never speak to the IT department. They all hide, have tried on mnay occasions and times..
    Is it possible for when my client for example, opens their outlook (IMAP), sends email to an email address, but just display the server IP and not their originating IP?
    From the log.. (not sure how to just capture the 1 email only, have cut out other items from between the lines)
    Code:
    Apr 22 12:07:50 mx1 postfix/smtps/smtpd[1020832]: connect from host86-163-68-15.range86-163.btcentralplus.com[86.163.68.15]
    Apr 22 12:07:50 mx1 postfix/smtps/smtpd[1020832]: 6F6A1580641: client=host86-163-68-15.range86-163.btcentralplus.com[86.163.68.15], sasl_method=LOGIN, [email protected]
    Apr 22 12:07:50 mx1 postfix/cleanup[1018503]: 6F6A1580641: message-id=<[email protected]>
    Apr 22 12:07:50 mx1 dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=86.163.68.15, lip=212.159.153.4, mpid=1022530, TLS, session=<dtrEPDz.............>
    Apr 22 12:07:50 mx1 postfix/qmgr[296989]: 6F6A1580641: from=<[email protected]>, size=11141, nrcpt=4 (queue active)
    Apr 22 12:07:51 mx1 postfix/smtp[1022006]: 6F6A1580641: to=<[email protected]>, relay=mailgate-a.valeofglamorgan.gov.uk[194.83.245.24]:25, delay=1.1, delays=0.55/0.02/0.25/0.32, dsn=5.7.1, status=bounced (host mailgate-a.valeofglamorgan.gov.uk[194.83.245.24] said: 550 5.7.1 86.163.68.15 listed at zen.spamhaus.org (in reply to end of DATA command))
     
  10. Jeremy007

    Jeremy007 Member

    You can only solve that problem by contacting "zen.spamhaus.org" and request they pull your i.p away form their spam filters. Not sure if you will even be able to reach them.
     

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