false smtp 3.14
hosts_require_auth host list unset smtp 4.00
hosts_require_dane host list unset smtp 4.91 (4.85 experimental)
+hosts_require_helo host list "*" main 4.95
hosts_require_ocsp host list unset smtp 4.82 if experimental_ocsp
hosts_require_tls host list unset smtp 3.20
hosts_treat_as_local domain list unset main 1.95
received_header_text string* + main
received_headers_max integer 30 main
recipient_unqualified_hosts host list unset main 4.00 replacing receiver_unqualified_hosts
-recipients_max integer 0 main 1.60
+recipients_max integer 50000 main 1.60 default changed in 4.95 (was 0)
recipients_max_reject boolean false main 1.70
redirect_router string unset routers 4.00
remote_max_parallel integer 1 main
smtp_accept_queue_per_connection integer 10 main 2.03
smtp_accept_reserve integer 0 main
smtp_active_hostname string* unset main 4.33
+smtp_backlog_monitor integer 0 main 4.95
smtp_banner string* + main
smtp_check_spool_space boolean true main 2.10
smtp_connect_backlog integer 5 main