> We are willing to put up a fully functional e-mail domain (restricted to
> 10
> user names) on one of our production servers and provide this list with
> the
> admin user name and password. This would allow the list to see and use
> Xerxes.
>
> Before we do that, we need some assurance that we can prevent any possible
> SPAM or UCE relay through our servers.
>
> Does anyone know of an easy way to control Postfix to slow down or
> restrict
> mail relay with domain name granularity.
>
> Curtis
> qwik.net
Hi,
Any advancement with your demo site?
Regards,
Leon
P.S.:
Did you mean regular postfix config to prevent relaying?
Here is some snap from my main.cf:
----------------------------------
smtpd_sender_restrictions =
check_client_access hash:/etc/postfix/reset_content_filter
hash:/etc/postfix/access
smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated,
reject_unknown_client
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_helo_required = yes
smtpd_helo_restrictions =
strict_rfc821_envelopes = yes
mynetworks = 127.0.0.0/8, 192.168.40.0/23
smtpd_recipient_restrictions =
permit_mynetworks,
permit_sasl_authenticated,
reject_unauth_destination,
check_recipient_access regexp:/etc/postfix/mailboxfull,
reject_invalid_hostname,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unknown_sender_domain,
reject_unknown_recipient_domain,
reject_rbl_client zen.spamhaus.org,
reject_rbl_client cbl.abuseat.org,
reject_rbl_client safe.dnsbl.sorbs.net,
reject_rbl_client list.dsbl.org,
check_client_access hash:/etc/postfix/client_checks,
check_sender_access regexp:/etc/postfix/filter-catchall.regexp,
permit
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