-# Uncomment the following line to add OCSP stapling support in TLS, if Exim
-# was built using OpenSSL.
-
-# EXPERIMENTAL_OCSP=yes
-
-# 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 add Per-Recipient-Data-Response support.
-# EXPERIMENTAL_PRDR=yes
-
-# Uncomment the following line to support Transport post-delivery actions,
-# eg. for logging to a database.
-# EXPERIMENTAL_TPDA=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 add DANE support
+# Note: Enabling this unconditionally overrides DISABLE_DNSSEC
+# Note: DANE is only supported when using OpenSSL
+# EXPERIMENTAL_DANE=yes