> On Feb 14, 2016, at 3:39 PM, Wietse Venema <wie...@porcupine.org> wrote:
> 
> This will be an incremental release, compared to the transition
> from 2.11 to 3.0. But it will still be worthwhile to update.
> 
> Plus some minor stuff.

A couple of the latter to highlight:

* In Postfix 3.1, by default DANE TLSA records will also be used even
  when a domain's MX records are not DNSSEC-validated, provided the
  TLSA records of the MX host are.  See:

    http://www.postfix.org/postconf.5.html#smtp_tls_dane_insecure_mx_policy

* The compiled-in non-export Diffie-Hellman parameters for the Postfix SMTP
  server now employ a 2048-bit rather than 1024-bit "safe-prime" (p = 2*q + 1,
  with q also prime. To ensure that g=2 generates a subgroup of order q, q is
  chosen to be 11 mod 24 and p is then 23 mod 24).

-- 
        Viktor.

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