Unless you really know what you are doing, leave it alone.
4. If not built with DISABLE_DNSSEC, Exim now has the main option
- dns_use_dnssec; if set to 1 then Exim will initialise the resolver library
+ dns_dnssec_ok; if set to 1 then Exim will initialise the resolver library
to send the DO flag to your recursive resolver. If you have a recursive
resolver, which can set the Authenticated Data (AD) flag in results, Exim
- can now detect this.
+ can now detect this. Exim does not perform validation itself, instead
+ relying upon a trusted path to the resolver.
Current status: work-in-progress; $sender_host_dnssec variable added.
16. New authenticated_sender logging option, adding to log field "A".
+17. New expansion variables $router_name and $transport_name. Useful
+ particularly for debug_print as -bt commandline option does not
+ require privilege whereas -d does.
+
+18. If built with EXPERIMENTAL_PRDR, per-recipient data responses per a
+ proposed extension to SMTP from Eric Hall.
+
+19. The pipe transport has gained the force_command option, to allow
+ decorating commands from user .forward pipe aliases with prefix
+ wrappers, for instance.
+
Version 4.80
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