# LOOKUP_CDB=yes
# LOOKUP_DSEARCH=yes
# LOOKUP_IBASE=yes
+# LOOKUP_JSON=yes
# LOOKUP_LDAP=yes
# LOOKUP_MYSQL=yes
# LOOKUP_MYSQL_PC=mariadb
# don't need to set LOOKUP_INCLUDE if the relevant directories are already
# specified in INCLUDE. The settings below are just examples; -lpq is for
# PostgreSQL, -lgds is for Interbase, -lsqlite3 is for SQLite, -lhiredis
-# is for Redis.
+# is for Redis, -ljansson for JSON.
#
# You do not need to use this for any lookup information added via pkg-config.
# 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 #
###############################################################################
# AUTH_CRAM_MD5=yes
# AUTH_CYRUS_SASL=yes
# AUTH_DOVECOT=yes
+# AUTH_EXTERNAL=yes
# AUTH_GSASL=yes
# AUTH_GSASL_PC=libgsasl
# AUTH_HEIMDAL_GSSAPI=yes