+#------------------------------------------------------------------------------
+# Compiling Exim with content scanning support: If you want to compile Exim
+# with support for message body content scanning, set WITH_CONTENT_SCAN to
+# the value "yes". This will give you malware and spam scanning in the DATA ACL,
+# and the MIME ACL. Please read the documentation to learn more about these
+# features.
+
+# WITH_CONTENT_SCAN=yes
+
+# If you want to use the deprecated "demime" condition in the DATA ACL,
+# uncomment the line below. Doing so will also explicitly turn on the
+# WITH_CONTENT_SCAN option. If possible, use the MIME ACL instead of
+# the "demime" condition.
+
+# WITH_OLD_DEMIME=yes
+
+# 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
+
+#------------------------------------------------------------------------------
+# Uncomment the following line to remove Per-Recipient-Data-Response support.
+
+# DISABLE_PRDR=yes
+
+#------------------------------------------------------------------------------
+# Uncomment the following line to remove OCSP stapling support in TLS,
+# from Exim. Note it can only be supported when built with
+# GnuTLS 3.1.3 or later, or OpenSSL
+
+# DISABLE_OCSP=yes
+
+#------------------------------------------------------------------------------
+# By default, Exim has support for checking the AD bit in a DNS response, to
+# determine if DNSSEC validation was successful. If your system libraries
+# do not support that bit, then set DISABLE_DNSSEC to "yes"
+
+# DISABLE_DNSSEC=yes
+
+
+#------------------------------------------------------------------------------
+# Compiling Exim with experimental features. These are documented in
+# experimental-spec.txt. "Experimental" means that the way these features are
+# implemented may still change. Backward compatibility is not guaranteed.
+
+# Uncomment the following line to add support for talking to dccifd. This
+# defaults the socket path to /usr/local/dcc/var/dccifd.
+
+# EXPERIMENTAL_DCC=yes
+
+# Uncomment the following lines to add SPF support. You need to have libspf2
+# installed on your system (www.libspf2.org). Depending on where it is installed
+# you may have to edit the CFLAGS and LDFLAGS lines.
+
+# EXPERIMENTAL_SPF=yes
+# CFLAGS += -I/usr/local/include
+# LDFLAGS += -lspf2
+
+# Uncomment the following lines to add SRS (Sender rewriting scheme) support.
+# You need to have libsrs_alt installed on your system (srs.mirtol.com).
+# Depending on where it is installed you may have to edit the CFLAGS and
+# LDFLAGS lines.
+
+# EXPERIMENTAL_SRS=yes
+# CFLAGS += -I/usr/local/include
+# LDFLAGS += -lsrs_alt
+
+# Uncomment the following lines to add Brightmail AntiSpam support. You need
+# to have the Brightmail client SDK installed. Please check the experimental
+# documentation for implementation details. You need to edit the CFLAGS and
+# LDFLAGS lines.
+
+# EXPERIMENTAL_BRIGHTMAIL=yes
+# CFLAGS += -I/opt/brightmail/bsdk-6.0/include
+# LDFLAGS += -lxml2_single -lbmiclient_single -L/opt/brightmail/bsdk-6.0/lib
+
+# Uncomment the following line to add DMARC checking capability, implemented
+# using libopendmarc libraries.
+# EXPERIMENTAL_DMARC=yes
+# CFLAGS += -I/usr/local/include
+# LDFLAGS += -lopendmarc
+
+
+# Uncomment the following line to support Events,
+# eg. for logging to a database.
+# EXPERIMENTAL_EVENT=yes
+
+# Uncomment the following line to add Redis lookup support
+# You need to have hiredis installed on your system (https://github.com/redis/hiredis).
+# Depending on where it is installed you may have to edit the CFLAGS and LDFLAGS lines.
+# EXPERIMENTAL_REDIS=yes
+# CFLAGS += -I/usr/local/include
+# LDFLAGS += -lhiredis
+
+# Uncomment the following line to enable Experimental Proxy Protocol
+# EXPERIMENTAL_PROXY=yes
+
+# Uncomment the following line to enable support for checking certiticate
+# ownership
+# EXPERIMENTAL_CERTNAMES=yes
+
+# Uncomment the following line to add DSN support
+# EXPERIMENTAL_DSN=yes
+
+# Uncomment the following line to add DANE support
+# EXPERIMENTAL_DANE=yes