exclude SSLv3 for all TLS

to mitigate POODLE vulnerability

roles/mailserver/templates/etc_postfix_main.cf.j2

 # TLS parameters
 smtpd_tls_mandatory_protocols=!SSLv2,!SSLv3
 smtp_tls_mandatory_protocols=!SSLv2,!SSLv3
+smtp_tls_protocols = !SSLv2,!SSLv3
+smtpd_tls_protocols = !SSLv2,!SSLv3
 smtpd_tls_cert_file=/etc/ssl/certs/wildcard_combined.pem
 smtpd_tls_key_file=/etc/ssl/private/wildcard_private.key
 smtpd_use_tls=yes