My test procedure follows telnet domain.com 25 ehlo me mail from: <t...@x.com> rcpt to: <doesntex...@domain.com> At this point I get "Ok" message, and I can continue writing the body of the e-mail. Because account doesn't exist, Postfix sends bounce notification back to sender address.
This is the output of postconf -n append_dot_mydomain = no biff = no broken_sasl_auth_clients = yes config_directory = /etc/postfix dovecot_destination_recipient_limit = 1 inet_interfaces = all inet_protocols = ipv4 mailbox_size_limit = 0 message_size_limit = 102400000 milter_default_action = accept milter_protocol = 2 mydestination = localhost myhostname = domain.com mynetworks = 127.0.0.0/8 non_smtpd_milters = inet:localhost:8891 readme_directory = no recipient_delimiter = + relayhost = resolve_numeric_domain = yes smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_milters = inet:localhost:8891 smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, check_sender_access $virtual_alias_maps, reject_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_path = private/auth smtpd_sasl_security_options = noanonymous smtpd_sasl_tls_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_tls_CAfile = /etc/ssl/certs/domain.com.chain.crt smtpd_tls_cert_file = /etc/ssl/certs/domain.com.crt smtpd_tls_key_file = /etc/ssl/private/domain.com.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes virtual_alias_maps = mysql:/etc/postfix/sqlconf/virtual_mailbox_maps.cf virtual_mailbox_domains = mysql:/etc/postfix/sqlconf/mydestination.cf virtual_transport = dovecot -- View this message in context: http://postfix.1071664.n5.nabble.com/Prevent-Backscatter-tp88359p88372.html Sent from the Postfix Users mailing list archive at Nabble.com.