(PureMessage is not listed at https://www.sophos.com/en-us/support/feature-requests.aspx so I'm putting this here.)
To allow better inter-system security, please enable support for DNSSEC and DANE in the provided version of Postfix in PureMesage for UNIX. Specifically, I want to specify the following configuration options in /opt/pmx6/postfix/etc/main.cf and not have them fail:
smtp_tls_security_level=danesmtp_dns_support_level=dnssec
(DANE) TLS authentication is available with Postfix 2.11 and later, so it appears that these options just need to be enabled at compile time.
See http://www.postfix.org/TLS_README.html#client_tls_dane for details.
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