https://dwiki.heisl.org/ 2026-04-19T14:55:54+00:00 https://dwiki.heisl.org/ https://dwiki.heisl.org/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2020-02-14T07:10:29+00:00 Anonymous (anonymous@undisclosed.example.com) https://dwiki.heisl.org/doku.php?id=linux:mail:postfix:restrictions&rev=1581664229&do=diff Classes Of Restrictions telnet 192.168.0.2 25 # Comments Trying 192.168.0.2... Connected to 192.168.0.2 (192.168.0.2). Escape character is '^]'. 220 mail.example.com ESMTP Postfix # <-smtp_client_restrictions HELO mail.example.com # <-smtp_helo_restrictions 250 mail.example.com # MAIL FROM:<ned@example.com> # <-smtp_sender_restrictions 250 2.1.0 Ok … text/html 2022-01-25T09:26:36+00:00 Anonymous (anonymous@undisclosed.example.com) https://dwiki.heisl.org/doku.php?id=linux:mail:postfix:tls_analyse&rev=1643102796&do=diff TLS Analyse Protokolle und Cipher Analyse um zu sehen welche TLS Versionen und Cipher beim Empfangen von Mails angewendet werden (Script läuft sehr schnell durch) cat /var/log/mail.log | grep "TLS connection established" | sed 's/.*: //g' | sort | uniq -c | sort -rn