Am 18.01.2012 17:36, schrieb Jon August: > Hi, > > We have a postfix machine setup as described here: > http://www.howtoforge.com/virtual-users-and-domains-with-postfix-courier-mysql-and-squirrelmail-ubuntu-11.10 > > and we would like to use a third party to do our spam filtering. So, we'd > like to continue using the machine for authenticated outbound mail, but we > want to limit the inbound mail to the third party mail server. How do we > configure postfix to do this? > > Outbound: > -------------- > ANY IP (authenticated) -> Postfix -> The World! (OK) > > Inbound: > ------------ > A.B.C.D -> Postfix (OK) > Anything else -> Postfix (DENIED)
BTW - normally you would like to have a dedicated service on a dedicated port where only the spamfilter submits his messages with as less overhead as possible, open port 10026 only for the spamfilter and so have seperated configurations public-ip-of-your-server:10026 inet n - n - - smtpd -o mynetworks=ip-of-the-spamfilter -o smtpd_client_connection_count_limit=75 -o smtpd_recipient_restrictions=permit_mynetworks, reject -o receive_override_options=no_header_body_checks,no_milters -o local_header_rewrite_clients= -o sender_dependent_relayhost_maps= -o content_filter= -o smtpd_delay_reject=no -o smtpd_client_restrictions= -o smtpd_helo_restrictions= -o smtpd_helo_required=no -o smtpd_sender_restrictions= -o smtpd_sender_login_maps= -o smtpd_data_restrictions= -o smtpd_end_of_data_restrictions= -o smtpd_restriction_classes= -o smtpd_error_sleep_time=0 -o smtpd_soft_error_limit=1001 -o smtpd_hard_error_limit=1000 -o smtpd_client_connection_rate_limit=0 -o smtpd_peername_lookup=no -o smtpd_use_tls=no -o smtpd_tls_security_level=none -o smtpd_sasl_auth_enable=no -o smtpd_reject_footer= -o max_idle=1h -o max_use=1000
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