Add warning about change of behavior for sendmail 8.15.2 under FreeBSD 11

with regards to IPv6 address representation in configuration/maps/rulesets.

1 files changed, 14 insertions, 0 deletions

diff --git a/UPDATING b/UPDATING
index 63b9a3f80b50..d2233b465b2b 100644
--- a/UPDATING
+++ b/UPDATING
@@ -31,6 +31,20 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 11.x IS SLOW:
 	disable the most expensive debugging functionality run
 	"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20150706:
+	sendmail has been updated to 8.15.2.  Starting with FreeBSD 11.0
+	and sendmail 8.15, sendmail uses uncompressed IPv6 addresses by
+	default, i.e., they will not contain "::".  For example, instead
+	of ::1, it will be 0:0:0:0:0:0:0:1.  This permits a zero subnet
+	to have a more specific match, such as different map entries for
+	IPv6:0:0 vs IPv6:0.  This change requires that configuration
+	data (including maps, files, classes, custom ruleset, etc.) must
+	use the same format, so make certain such configuration data is
+	upgrading.  As a very simple check search for patterns like
+	'IPv6:[0-9a-fA-F:]*::' and 'IPv6::'.  To return to the old
+	behavior, set the m4 option confUSE_COMPRESSED_IPV6_ADDRESSES or
+	the cf option UseCompressedIPv6Addresses.
+
 20150630:
 	The default kernel entropy-processing algorithm is now
 	Fortuna, replacing Yarrow.