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Ok so i see it is nonsence to completely block SMTP for auth only, because then the mail server cannot even receive mails. SMTP must remain open for anonyms and allow to send mails to local mailboxes, if i am right. Of course is good if it will block to send emails to another domains (for anonymous connections), but that should be default configuration.


Standalone postfix does not have SASL capabilities, you must install Cyrus or Dovecot. Take a look at postfix official doc. http://www.postfix.org/SASL_README.html#server_sasl


Ok, it seems, i have to also add this: smtpd_delay_reject = yes smtpd_client_restrictions = permit_sasl_authenticated, reject as stated here: http://www.postfix.org/postconf.5.html under smtpd_sasl_auth_enable

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