Package: postfix
Version: 3.1.6-0+deb9u1
Severity: minor

Dear Maintainer,

The postconf(5) manpage states: 

smtpd_enforce_tls (default: no)
       Mandatory TLS: announce STARTTLS support to remote  SMTP  clients,  and
       require  that  clients  use TLS encryption.  According to RFC 2487 this
       MUST NOT be applied in case of a publicly-referenced SMTP server.  This
       option is therefore off by default.

RFC 2487 has been obsoleted by RFC 3207 (See

-- System Information:
Debian Release: 9.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: i386 (i686)

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