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private:mail-server:gateway

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private:mail-server:gateway [2020/01/14 22:31] – snemecprivate:mail-server:gateway [2020/02/11 13:55] (aktuální) – [Fail2ban - Postfix SASL attack] snemec
Řádek 1: Řádek 1:
 +====== Mail gateway ======
  
 +===== Postfix konfigurace =====
 +
 +Postfix, Amavis, Clamav, SpamAssassin
 +
 +https://rimuhosting.com/knowledgebase/linux/mail/greylisting%20with%20postgrey
 +
 +http://www.normyee.net/blog/2011/08/05/more-robust-postfix-anti-spam-configuration/
 +
 +https://www.akadia.com/services/postfix_amavisd.html
 +
 +https://docs.iredmail.org/install.iredmail.on.debian.ubuntu.html
 +
 +Postfix: sender-dependent SASL authentication.md\\
 +https://gist.github.com/zmwangx/2c56aa32be68daf48c2f
 +
 +Postfix: selecting relay host based on From: mail header rather than envelope sender
 +https://serverfault.com/questions/679975/postfix-selecting-relay-host-based-on-from-mail-header-rather-than-envelope-se
 +
 +
 +Policyd - limit pro odesílané zprávy
 +
 +http://ngocquyetlinux.blogspot.com/2013/05/limit-mail-with-policyd.html
 +==== SPF DKIM DMARC ====
 +
 +
 +
 +https://www.digitalocean.com/community/tutorials/how-to-use-an-spf-record-to-prevent-spoofing-improve-e-mail-reliability
 +
 +https://www.michalblazek.cz/e-mail-marketing/nespadnete-do-spamu-dkim-spf
 +
 +https://docs.iredmail.org/setup.dns.html
 +
 +https://protodave.com/tools/dkim-key-checker/
 +
 +https://askubuntu.com/questions/438756/using-dkim-in-my-server-for-multiple-domains-websites
 +
 +https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-dkim-with-postfix-on-debian-wheezy
 +
 +https://www.linode.com/docs/email/postfix/configure-spf-and-dkim-in-postfix-on-debian-8/
 +
 +https://blog.philipp.info/2017/01/inbound-and-outbound-spamantivirus-mail-gateway/3/
 +
 +https://scaron.info/blog/debian-mail-spf-dkim.html
 +
 +https://serverfault.com/questions/861642/opendkim-not-signing-mail
 +
 +https://groups.google.com/forum/#!topic/rspamd/sb_JQgKRRCM
 +===== Spam =====
 +
 +https://www.linuxbabe.com/mail-server/block-email-spam-postfix
 +
 +https://thomas-leister.de/en/mailserver-debian-stretch/
 +
 +==== SpamAssassin ====
 +
 +
 +https://wiki.apache.org/spamassassin/AdjustRuleScore
 +
 +Obrázkové emaily - nastavil jsem v ''/etc/spamassassin/local.cf'' parametr ''MAILING_LIST_MULTI'' na **+1**\\
 +Originálni konfigurační soubory jsou uloženy: ''/usr/share/spamassassin''
 +
 +
 +Příklad hlaviček SPAM emailů - dva jsou obrázkové\\
 +<hidden>
 +<code>
 +Return-Path: <uylucbz@mainstree.eu>
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 +X-Original-Helo: mailgw01.emcc.cz (iRedMail: http://www.iredmail.org/)
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 +X-Virus-Scanned: Debian amavisd-new at mailgw02.emcc.cz
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 + MPART_ALT_DIFF=0.724, RDNS_NONE=1.274, SPF_PASS=-0.001,
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 + with ESMTP id E9uuftbHMya5 for <info@emcc.cz>;
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 +X-Virus-Scanned: Debian amavisd-new at mailgw02.emcc.cz
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 +X-Original-Helo: mailgw01.emcc.cz (iRedMail: http://www.iredmail.org/)
 +Received: from mailgw01.emcc.cz (unknown [10.13.238.21])
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 +X-Virus-Scanned: Debian amavisd-new at mailgw02.emcc.cz
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 +Content-Type: multipart/related;
 + type="multipart/alternative";
 + boundary="----=_NextPart_000_0006_01D4C98A.F9857590"
 +Precedence: bulk
 +List-Id: b33260101v08802510
 +X-Complaints-To: abuse@dreamse.eu
 +List-Unsubscribe: <http://dreamse.eu/ru/unsubscribe/do?hash=1620272853570574>
 +
 +</code>
 +</hidden>
 +
 +==== Fail2ban - Postfix SASL attack ====
 +
 +https://bobcares.com/blog/fail2ban-postfix-sasl/
 +
 +
 +==== Postfix: remove and webserve attachments ====
 +
 +
 +http://using-debian.blogspot.com/2016/05/postfix-remove-and-webserve-attachments.html
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