local_domains: hostname vs domain name

[NiceGuyIT]

Hello,

I have Maddy up and running which is great. Thank you!

I'm configuring postfix on other hosts to send email to a local mailbox on Maddy. (Not a relay.) Here's what I need to do to get it to work.

Add the hostname to the $(local_domains).

$(local_domains) = $(primary_domain) pc-home01.example.tld

Add an alias to map the remote email (user@hostname) to the local user.

[email protected]:  [email protected]

Then in postfix, specify the hostname of the sender.

myhostname = pc-home01.example.tld

While this works, adding many hostnames to $(local_domains) gets messy. Is $(local_domains) domains or hostnames? I thought this would work but it doesn't.

$(local_domains) = $(primary_domain) example.tld

I saw some references to tables and using tables as a k/v pair lookup. I could probably do this with the aliases but I don't see how to do this with $(local_domains). What's the best approach?

Is there a way to send from postfix to Maddy while preserving the hostname and not having tons of hostnames appended to $(local_domains)?

[NiceGuyIT]

Here's what I'm currently using. All sent emails are to local mailboxes. The table.chain strips the username from the email in order to lookup the subdomain, which in turn prevents user_to_email identity from working. This is doable until I find a better way to handle this scenario.

# Use a file to check for valid subdomains as the recipient.
table.chain subdomains {
	# Remove the subdomains
	# [email protected] => [email protected]
	# [email protected] => [email protected]
	# [email protected] => [email protected]
	#step regexp "(.+)@.*(.+)\.(.+)" "$1@$2.$3"
	step regexp "(.+)@(.+)" "$2"
	optional_step file /etc/maddy/subdomains
}

submission tls://0.0.0.0:465 tcp://0.0.0.0:587 {
	source $(local_domains) {
		...
	}

	default_source {

		# Process subdomains
		destination_in &subdomains {

			check {
				# FIXME: This causes an "Unauthorized use of sender address" error followed by
				# "address: precis: address: missing at-sign", presumably because the at-sign
				# was removed in the &subdomains block.
				#authorize_sender {
				#   prepare_email &local_rewrites
				#   user_to_email identity
				#}
			}

			# Deliver to local mailboxes
			deliver_to &local_routing

		}

		default_destination {
			reject 501 5.1.8 "Non-local sender domain"
		}
	}
}