transport_maps simply routes accepted messages by overriding DNS.
That's what I want to continue to do, as had occurred happily before the
postfix upgrade.
To accept mail, the envelope recipient *must* be in mydestination,
relay_domains, virtual_alias_domains or virtual_mailbox_domains.
All may be a type:table input for lookups.
You should have *one* domain in *one* address class.
See http://www.postfix.org/ADDRESS_CLASS_README.html for details
That's all well and good, but I shouldn't need to list all the MX'ed
machines in any of those.
-Eric
