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Download the server edition of Ubuntu 18.04 and install it as usualRename the network interface to eth0Remove netplan , install ifupdown and configure IP addressesConfigure UFW (Uncomplicated Firewall) Open TCP ports 22, 25, 80, 443, 465, 993, 8080 Open UDP port 123 Add nameservers Install ISPConfig according to the Perfect Server installation instructions Install missing packages for amavisd-new Secure ISPConfig installation with SSL certificates as described at howtoforge.com Update Spamassassin Allow dots for IMAP folders with Dovecot Listescape pluginInstall Sieve service for Roundcubemail and Thunderbird Install ISPConfig Automail Install SPF , DKIM , DMARC Install Spamassassin autolearn Improve Postfix antispam settings Install Munin Beitrags-Navigation Sofern Sie Ihre Datenschutzeinstellungen ändern möchten z.B. Erteilung von Einwilligungen, Widerruf bereits erteilter Einwilligungen klicken Sie auf nachfolgenden Button. Einstellungen