+# If you're using ClamAV and are backporting fixes to an old version, instead
+# of staying current (which is the more usual approach) then you may need to
+# use an older API which uses a STREAM command, now deprecated, instead of
+# zINSTREAM. If you need to set this, please let the Exim developers know, as
+# if nobody reports a need for it, we'll remove this option and clean up the
+# code. zINSTREAM was introduced with ClamAV 0.95.
+#
+# WITH_OLD_CLAMAV_STREAM=yes
+
+#------------------------------------------------------------------------------
+# By default Exim includes code to support DKIM (DomainKeys Identified
+# Mail, RFC4871) signing and verification. Verification of signatures is
+# turned on by default. See the spec for information on conditionally
+# disabling it. To disable the inclusion of the entire feature, set
+# DISABLE_DKIM to "yes"
+
+# DISABLE_DKIM=yes
+
+