On 1/22/2011 9:45 PM, IT geek 31 wrote:
smtpd_recipient_restrictions =
     permit_sasl_authenticated,
     permit_mynetworks,
     reject_unauth_destination,
     check_sender_access hash:/usr/pkg/etc/postfix/sender_access,
     reject_unauth_pipelining,
... (more)

The main thing is that reject_unauth destination is immediately after your relay exceptions (permit_mynetworks and such) and before sender_access, assuming sender_access is a list of sites to ONLY override the filters imposed beyond it. The reject_unauth_pipelining is ok, but this can be more securely implemented by appending it in smtpd_data_restrictions:

smtpd_data_restrictions =       reject_multi_recipient_bounce,
                                reject_unauth_pipelining,
permit_auth_destination ... (more)

Jerrale G.
SC Senior Admin

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