Whitelist sender even on IP's listed on RBL

Discussion in 'General' started by W-C, Dec 14, 2017.

  1. W-C

    W-C Member

    Hello,

    Sometimes postfix block one sender when he try to send email from his mobile using 4G, the IP's on 4G Networks are constantly changing so I know is pretty difficult to find out which IP's are listed on RBL and which ones are not.
    Is there any way I can tell postfix to always sent emails from this user regarding if the IP that he is using are listed on RBL?,
    Is supposed that if the smtp auth is correct the sender would be able to sent email even if the IP's are RBL listed or I am wrong?

    Thanks in advance

    Postfix Configuration:
    [email protected] log]# postconf -n
    alias_database = hash:/etc/aliases
    alias_maps = hash:/etc/aliases
    body_checks = regexp:/etc/postfix/body_checks
    broken_sasl_auth_clients = yes
    command_directory = /usr/sbin
    config_directory = /etc/postfix
    content_filter = amavis:[127.0.0.1]:10024
    daemon_directory = /usr/libexec/postfix
    data_directory = /var/lib/postfix
    debug_peer_level = 2
    enable_original_recipient = no
    header_checks = regexp:/etc/postfix/header_checks
    html_directory = no
    inet_interfaces = all
    inet_protocols = all
    mail_owner = postfix
    mailbox_size_limit = 0
    mailq_path = /usr/bin/mailq.postfix
    manpage_directory = /usr/share/man
    message_size_limit = 0
    mime_header_checks = regexp:/etc/postfix/mime_header_checks
    mydestination = natsrv.mydomain.com, mail.mydomain.com, localhost, localhost.localdomain
    myhostname = mail.mydomain.com
    mynetworks = 127.0.0.0/8 [::1]/128
    nested_header_checks = regexp:/etc/postfix/nested_header_checks
    newaliases_path = /usr/bin/newaliases.postfix
    proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps
    queue_directory = /var/spool/postfix
    readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES
    receive_override_options = no_address_mappings
    relay_domains = mysql:/etc/postfix/mysql-virtual_relaydomains.cf
    relay_recipient_maps = mysql:/etc/postfix/mysql-virtual_relayrecipientmaps.cf
    relayhost =
    sample_directory = /usr/share/doc/postfix-2.6.6/samples
    sendmail_path = /usr/sbin/sendmail.postfix
    setgid_group = postdrop
    smtpd_client_restrictions = check_client_access mysql:/etc/postfix/mysql-virtual_client.cf
    smtpd_delay_reject = yes
    smtpd_helo_required = yes
    smtpd_helo_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_invalid_helo_hostname
    smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, check_recipient_access mysql:/etc/postfix/mysql-virtual_recipient.cf, reject_unauth_destination, reject_invalid_hostname, reject_unknown_recipient_domain, reject_unauth_pipelining, reject_rbl_client zen.spamhaus.org, reject_rbl_client b.barracudacentral.org, reject_rbl_client bl.spamcop.net
    smtpd_sasl_auth_enable = yes
    smtpd_sasl_authenticated_header = yes
    smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/mysql-sender.cf, reject_rbl_client zen.spamhaus.org
    smtpd_tls_cert_file = /etc/postfix/smtpd.cert
    smtpd_tls_key_file = /etc/postfix/smtpd.key
    smtpd_tls_security_level = may
    smtpd_use_tls = yes
    transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf
    unknown_local_recipient_reject_code = 550
    virtual_alias_domains =
    virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf
    virtual_gid_maps = static:5000
    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 = maildrop
    virtual_uid_maps = static:5000
     
  2. florian030

    florian030 ISPConfig Developer ISPConfig Developer

    The easiest way is, that this client uses port 587 instead of 25. 587 is the standard-port für MUA, while 25 should be used for other MTA only.
     
    prefabrikler and W-C like this.
  3. W-C

    W-C Member

    We'll try using port 587.

    Thanks florian030
     

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