robert fitzpatrick wluhewebtentnet tue 20080226 1200 0100 mailingliste wrote use senderaddress verification could easily dos verification keeps postfix busy long slow servers probe said post postconf n output yes use senderaddress verification extremely helpful keeping mail filter better way verify addresses gateway one sorry forgot post postconf n esmtp postconf n address_verify_map btreehomemtaverify address_verify_poll_count 1 bounce_queue_lifetime 1d broken_sasl_auth_clients yes command_directory usrlocalsbin config_directory usrlocaletcpostfix content_filter smtpamavis12700110024 daemon_directory usrlocallibexecpostfix delay_warning_time 4h disable_vrfy_command yes html_directory mail_name postfix internet mail gateway mail_owner postfix mailbox_size_limit 102400000 mailq_path usrlocalbinmailq manpage_directory usrlocalman maximal_backoff_time 1000s maximal_queue_lifetime 3d message_size_limit 51200000 mynetworks 1270008 100008 newaliases_path usrlocalbinnewaliases queue_directory varspoolpostfix readme_directory relay_domains hashusrlocaletcpostfixrelay_transportmap ldapusrlocaletcpostfixldaptransportcf sample_directory usrlocaletcpostfix sendmail_path usrlocalsbinsendmail setgid_group maildrop smtpd_banner myhostname esmtp mail_name use server indicates read agreed aup uce allowed smtpd_data_restrictions reject_unauth_pipelining permit smtpd_helo_restrictions permit_mynetworks smtpd_recipient_restrictions permit_sasl_authenticated permit_mynetworks reject_unauth_destination reject_non_fqdn_sender reject_non_fqdn_recipient check_helo_access hashusrlocaletcpostfixhelo_checks check_client_access hashusrlocaletcpostfixclient_checks check_recipient_access pcreusrlocaletcpostfixrecipient_checkspcre reject_rbl_client listdsblorg reject_rbl_client zenspamhausorg reject_unverified_recipient permit smtpd_sasl_auth_enable yes smtpd_sasl_security_options noanonymous smtpd_sender_restrictions permit_mynetworks reject_unknown_sender_domain transport_maps hashusrlocaletcpostfixrelay_transportmap ldapusrlocaletcpostfixldaptransportcf unknown_local_recipient_reject_code 550 robert thu 07 aug 2008 204800 0500 number rejections exploded