> a) Put all restrictions into smtpd_recipient_restrictions:
>
> smtpd_recipient_restrictions =
> check_sender_access hash:/etc/postfix/relay_domains.map,
> reject_unknown_sender_domain,
> permit_mynetworks,
> check_relay_domains
>
> and relay_domains.map would return not OK or REJECT, but the name of a
> restriction class, e.g. foobar:

How do the ordering of these options work? Maybee I'm dumb, but I've read
the documentation over and over again, I can't seem to figure it out.

At first I thought it was an ALLOW ALL/DENY FEW operation, like it would go
down the list looking for a rule to REJECT against, otherwise defaulting to
OK. Then I saw the option for putting a PERMIT at the bottom of the
ruleset, which implies a DENY ALL/ALLOW FEW order. So now, I just play
musical rulesets with the options and telnet to the mail port until I get
the desired result. Can someone shed some light on this for me?

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