dkim_selector string* unset smtp 4.70
dkim_sign_headers string* (RFC4871) smtp 4.70
dkim_strict string* unset smtp 4.70
+dkim_timestamps integer* unset smtp 4.92
dkim_verify_signers string* $dkim_signers main 4.70
directory string* unset appendfile
directory_file string* + appendfile
dmarc_tld_file string unset main 4.82 if experimental_dmarc
dns_again_means_nonexist domain list unset main 1.89
dns_check_names_pattern string + main 2.11
+dns_cname_loops integer 0 main 4.92 Set to 9 for older behaviour
dns_csa_search_limit integer 5 main 4.60
dns_csa_use_reverse boolean true main 4.60
dns_dnssec_ok integer -1 main 4.82