I upgraded from 5.0 (compiled 2017-10-17) to 5.2 on Friday. Sometime today, my laptop spontaneously half-rebooted, so I tried to shell into it from my DFly box and found that Postfix was giving an error every minute. It now requires that there be an smtpd_relay_restrictions or smtpd_recipient_restrictions (I had neither) with a certain clause. I copied the parameter from one of my other mailservers, deleted the check_client_access and check_recipient_access clauses (zyxomma is accessible only via IPv6, the address changes once a thunderstorm, and all the emali it gets is forwarded from another box), and was up and running again.
Pierre -- Jews use a lunisolar calendar; Muslims use a solely lunar calendar.
