-11. Faster TLS startup. When various configuration options contain no
- expandable elements, the information can be preloaded and cached rather
- than the previous behaviour of always loading at startup time for every
- connection. This helps particularly for the CA bundle.
-
-12. Proxy Protocol Timeout is configurable via "proxy_protocol_timeout"
- main config option.
-
-13. Option "smtp_accept_msx_per_connection" is now expanded.
-
-14. Log selector "queue_size_exclusive", enabled by default, to exclude the
- time taken for reception from QT log elements.
-
-15. Main option "smtp_backlog_monitor", to set a level abve which listen
- socket backlogs are logged.
-
-16. Main option "hosts_require_helo", requiring HELO or EHLO before MAIL.