in fact some of them were inherited from earlier versions.
-----------------------------------------------------------------------------------------
-accept_8bitmime boolean false main 1.60
+accept_8bitmime boolean true main 1.60 changed to true in 4.78
acl_not_smtp string* unset main 4.11
acl_not_smtp_mime string* unset main 4.51 with content scan
acl_smtp_auth string* unset main 4.00
maildir_format boolean false appendfile 1.70
maildir_retries integer 10 appendfile 1.70
maildir_tag string* unset appendfile 1.92
-maildir_use_size_file boolean false appendfile 4.30
+maildir_use_size_file boolean* false appendfile 4.30 expanded in 4.77
maildirfolder_create_regex string unset appendfile 4.62
mailstore_format boolean false appendfile 2.00
mailstore_prefix string* unset appendfile 2.00
once_file_size integer 0 autoreply 3.20
once_repeat time 0s autoreply 2.95
one_time boolean false redirect 4.00
-openssl_options string "+dont_insert_empty_fragments" main 4.73
+openssl_options string unset main 4.73 default to unset in 4.78
optional boolean false iplookup 4.00
oracle_servers string unset main 4.00
owners string list unset redirect 4.00
senders address list unset routers 4.00
serialize_hosts host list unset smtp 1.60
server_advertise_condition string* unset authenticators 4.14
+server_channelbinding bool false gsasl 4.78
server_condition string* unset authenticators 3.10 (plaintext) 4.64 (others)
-server_hostname string* "$primary_hostname" cyrus_sasl 4.43
+server_hostname string* "$primary_hostname" cyrus_sasl,gsasl,heimdal_gssapi (cyrus-only) 4.78 (others)
+server_keytab string* unset heimdal_gssapi 4.78
server_mail_auth_condition string* unset authenticators 3.22
-server_mech string public_name cyrus_sasl 4.43
+server_mech string public_name cyrus_sasl,gsasl 4.43 (cyrus-only) 4.78 (others)
+server_password string unset gsasl 4.78
server_prompts string* unset plaintext 3.10
-server_realm string unset cyrus_sasl 4.43
+server_realm string unset cyrus_sasl,gsasl 4.43 (cyrus-only) 4.78 (others)
+server_scram_iter string* unset gsasl 4.78
+server_scram_salt string* unset gsasl 4.78
server_secret string* unset cram_md5 3.10
-server_service string "smtp" cyrus_sasl 4.43
+server_service string "smtp" cyrus_sasl,gsasl,heimdal_gssapi (cyrus-only) 4.78 (others)
server_set_id string* unset authenticators 3.10
shadow_condition string* unset transports
shadow_transport string unset transports
tls_remember_emstp boolean false main 4.21
tls_require_ciphers string* unset smtp 4.00 replaces tls_verify_ciphers
string* unset main 4.33
+tls_sni string* unset main 4.78
tls_tempfail_tryclear boolean true smtp 4.05
tls_try_verify_hosts host list unset main 4.00
tls_verify_certificates string* unset main 3.20
-bV Verify version number
-bv Test recipient address verification
-bvs Test sender address verification
+-bw + Inetd wait mode
-C + Use alternate configuration file
-D + Define macro for configuration file
-d + Turn on debugging output
3. BUILD TIME OPTIONS FOR EXIM
------------------------------
-The table below contains a complete list of options that can be set in
-Local/Makefile when building Exim. More information about individual options
-can be found in src/EDITME and OS/Makefile-Default.
+The table below contains a "mostly" complete list of options that can be
+set in Local/Makefile when building Exim. The only items not included are
+those whose names can be trivially derived from rules stated below.
+
+More information about individual options can be found in src/EDITME and
+OS/Makefile-Default.
The second column below gives the type of option:
actually want to modify a setting from the OS-specific file, there is nothing
to stop you overriding it in your Local/Makefile.
+When building Exim with dynamically loaded lookup support, for "LOOKUP_FOO",
+you can define "LOOKUP_FOO_INCLUDE" and "LOOKUP_FOO_LIBS", for includes and
+libraries specific only to that module. These rules are only used where the
+relevant lookup is a module. These options are not explicitly listed below.
+
+Variables with names endined `_PC' are used for pkg-config integration; setting
+the value to the name of a pkg-config package will cause Exim's build system to
+query the --cflags and --libs for the given name, when building anything
+dependent upon the component associated with the `_PC' variable. For lookups,
+if the lookup is dynamically loaded, then this *replaces* the use of the
+corresponding _INCLUDE and _LIBS options, which will be ignored. If the lookup
+is statically loaded into Exim, the results will be inserted into the
+"LOOKUP_INCLUDE" and "LOOKUP_LIBS" options. For authenticator, the results
+will be inserted into the "CFLAGS" and "AUTH_LIBS" options. These options are
+only listed below for the TLS implementation cases.
+
+
Option Type Description
------------------------------------------------------------------------------
AR system command to build a library
AUTH_CRAM_MD5 driver include cram_md5 authenticator
AUTH_CYRUS_SASL driver include Cyrus SASL authenticator
+AUTH_GSASL driver include GNU SASL authenticator
+AUTH_HEIMDAL_GSSAPI driver include Heimdal GSSAPI authenticator
+AUTH_LIBS system library linkage for authenticators
AUTH_PLAINTEXT driver include plaintext authenticator
AUTH_SPA driver include SPA (NTLM) authenticator
AUTH_VARS=3 optional* number of $auth variables
TRUSTED_CONFIG_LIST optional config files safe to retain privileges
USE_DB system** use native DB interface
USE_GNUTLS optional use GnuTLS instead of OpenSSL
+USE_GNUTLS_PC optional probably "gnutls"
+USE_OPENSSL_PC optional probably "openssl"
USE_READLINE optional try to load libreadline for -be
USE_TCP_WRAPPERS system link with tcpwrappers
USE_TDB optional use the tdb DB interface