On 5 Sep 2001 03:25:47 +0200, Chip Paswater <turk182chipware.net> wrote:

>> 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.

The restrictions are evaluated in the order they're specified. They
can return OK, REJECT (in these cases the evaluation ENDS) or DUNNO
(in which the next restriction is evaluated).

Example above:

check_sender_access hash:/etc/postfix/relay_domains.map
ist checked. Depending if an entry in
hash:/etc/postfix/relay_domains.map matches the envelope sender, the
corresponding RHS value is returned (OK, REJECT, "554 Pissoff", or the
name of a restriction_class).
Let's say nothing matches ->
reject_unknown_sender_domain is evaluated.
Let's say the sender_domain is valid ->
permit_mynetworks is evaluated. If the client is in $mynetworks, OK is
returned and the evaluation ends, if not ->
check_relay_domains is evaluated:
It's a special rstriction which returns EITHER OK or REJECT, so
nothing behind check_relay_domains will EVER be evaluted.

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