From: Sandy Drobic (postfix-usersjapantest.homelinux.com)
Date: Mon Mar 03 2008 - 15:04:36 CST

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Ion-Mihai Tetcu wrote:
> Hi,
>
>
> What I'm trying to understand is why mail for non-existent virtual
> mailboxes is greylisted instead of rejected from the start.

Because by default the recipient_map is checked at the end of
smtpd_recipient_restrictions. You can place this check manually by inserting
reject_unlisted_recipient into smtpd_recipient_restrictions:

smtpd_recipient_restrictions =
        reject_non_fqdn_sender,
        reject_non_fqdn_recipient,
        permit_mynetworks,
        permit_sasl_authenticated,
        reject_unauth_destination,
        reject_unlisted_recipient
        reject_invalid_helo_hostname,
# reject_rbl_client zen.spamhaus.org
        reject_rhsbl_sender dsn.rfc-ignorant.org,
        reject_rhsbl_sender bogusmx.rfc-ignorant.org,
        check_policy_service inet:127.0.0.1:10023,
        check_client_access pcre:/usr/local/etc/postfix/dspamd_filter_access,

I've reordered your checks a bit and removed checks without use
(reject_unknown_recipient_domain after reject_unauth_destination will only
reject your own domains, permit_auth_destination as the last check is also
unnecessary since that is the only possibility after
reject_unauth_destination). Try zen.spamhaus.org.

--
Sandy

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