> My client want this. Let's say - it just some company standards. > if he insists - I would recommend them to use another MTA, for > example exim
If they want it now, then use an MTA that implements it now. This is the first request for client information inside smtpd_banner text, so don't expect that it gets immediate priority. If someone wants this then they could build on existing code that implements smtpd_reject_footer, and that expands $client_address, $client_port, $localtime, and $servername. Wietse