wh...@hushmail.com: > Aug 31 21:38:14 johndoe postfix/smtpd[16200]: > s097.networking4all.com[213.249.64.242]: TLS cipher list > "ALL:!EXPORT:!LOW:!MEDIUM:+RC4:@STRENGTH" ... > smtpd_tls_security_level = may > smtpd_tls_mandatory_ciphers = medium > smtp_tls_protocols = !SSLv2, !SSLv3
Comment out all your smtpd_tls lines (including the lines that you did not show) until the output from the command "postconf -n" shows only these four: smtpd_tls_CAfile smtpd_tls_cert_file smtpd_tls_key_file smtpd_tls_security_level Then add back your tweaks one by one (executing the command "postfix reload" after each change) and learn which change breaks inter-operability. You may also find some helpful hints in www.postfix.org/TLS_README.html. Wietse