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-rw-r--r--network/exim/exim.Makefile5
1 files changed, 5 insertions, 0 deletions
diff --git a/network/exim/exim.Makefile b/network/exim/exim.Makefile
index 08befe0e5dd7..90ccf38ad8f4 100644
--- a/network/exim/exim.Makefile
+++ b/network/exim/exim.Makefile
@@ -523,6 +523,11 @@ DISABLE_MAL_MKS=yes
# Uncomment the following line to add queuefile transport support
# EXPERIMENTAL_QUEUEFILE=yes
+# Uncomment the following to add REQUIRETLS support.
+# You must also have SUPPORT_TLS enabled.
+# Ref: https://datatracker.ietf.org/doc/draft-fenton-smtp-require-tls
+# EXPERIMENTAL_REQUIRETLS=yes
+
###############################################################################
# THESE ARE THINGS YOU MIGHT WANT TO SPECIFY #
###############################################################################