[Postfix] Fix mandatory encryption protocols and always require at least TLS 1.2 for LMTP

data/conf/postfix/main.cf

@@ -94,12 +94,16 @@ smtpd_tls_dh1024_param_file = /etc/ssl/mail/dhparams.pem
 smtpd_tls_eecdh_grade = auto
 smtpd_tls_exclude_ciphers = ECDHE-RSA-RC4-SHA, RC4, aNULL, DES-CBC3-SHA, ECDHE-RSA-DES-CBC3-SHA, EDH-RSA-DES-CBC3-SHA
 smtpd_tls_loglevel = 1
+
 smtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
 smtp_tls_protocols = !SSLv2, !SSLv3
+
 lmtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
-lmtp_tls_protocols = !SSLv2, !SSLv2, !SSLv3
-smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
+lmtp_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
+
+smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
 smtpd_tls_protocols = !SSLv2, !SSLv3
+
 smtpd_tls_security_level = may
 tls_preempt_cipherlist = yes
 tls_ssl_options = NO_COMPRESSION