Christophs outsourced brain https://www.hackerbruecke.net/ Sun, 12 Apr 2026 13:29:11 +0000 FeedCreator 1.8 https://www.hackerbruecke.net/_media/wiki/favicon.ico https://www.hackerbruecke.net/ https://www.hackerbruecke.net/linux/email/postfix/sasl?rev=1493132202&do=diff SASL A very conveniant way of configuring the Simple Authentication and Security Layer (SASL) is to use the Pluggable Authentication Modules (PAM), since it can use diffrent authentication sources like ldap or /etc/passwd - thus SASL is everything but simple anonymous@undisclosed.example.com (Anonymous) Tue, 25 Apr 2017 14:56:42 +0000 https://www.hackerbruecke.net/linux/email/postfix/postfix_secure?rev=1493132183&do=diff Postfix with TLS and SSL (smtps) Use a portscanner like „nmap“: station7:/etc/init.d # nmap localhost | grep smtp 25/tcp open smtp -> smtp is only running at port 25! TLS Modify the TLS-settings in /etc/postfix/main.cf #--- SSL/TLS setting ---# smtpd_client_restrictions= permit_tls_clientcerts, permit_sasl_authenticated smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, permit_tls_clientcerts, reject_unauth_destination, check_sender_access hash:/etc/… anonymous@undisclosed.example.com (Anonymous) Tue, 25 Apr 2017 14:56:23 +0000