> I'm assuming that you have "inet_protocols=ipv6" in main.cf, instead > of the backwards-compatibility "inet_protocols=ipv4" workaround, > because that would not work on your machine.
No, that was a fresh install attempt, no directory /etc/postfix or /usr/local/etc/postfix, no previous main.cf or master.cf files. The problem is in the hardwired inet_protocols=ipv4 in the code, if I remember correctly. Mark