4. SPF support is promoted from Experimental to mainline status. The template
src/EDITME makefile does not enable its inclusion.
+ 5 Logging control for DKIM verification. The existing DKIM log line is
+ controlled by a "dkim_verbose" selector which is _not_ enabled by default.
+ A new tag "DKIM=<domain>" is added to <= lines by default, controlled by
+ a "dkim" log_selector.
+
Version 4.90
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