text_combined: noel jones ubdarhmeganvbhcsorg hill wrote thu 28 feb 2008 1114 1030 scipadvanceonnet confabulated thanks help made suggested changes im wondering tell sending verification test email relay server seeing something maillog reject_unverified_recipients filter servers see something similar logs feb 28 011749 smtpgate postfixsmtpd14535 noqueue reject rcpt mx184regionalrestaurantbusinesscardscom6511119184 550 511 recipient address rejected undeliverable address host 19216811201921681120 said 550 friqyffexamplecom unknown user account reply rcpt command from186009examplecomfriqyffmx184regionalrestaurantbusinesscardscom protosmtp helo ip mentioned log entry 1921681120 internal email server addresses verified using reject_unverified_recipients logged recipient rejected reject_unverified_recipient log also show probes sent target system something like feb 27 205716 mgate2 postfixsmtp96947 088b1797828 relay101054101010541025 delay013 delays003001003005 dsn200 statusdeliverable 250 ok mostly look like normal smtp deliveries except note statusdeliverable probe successful also see modify time change address_verify_map database list contents address_verify_map postmap see users know undeliverable logged statusdeliverable nexthop system reject unknown recipients smtp reject_unverified_recipient useful domain case either fix nexthop system use another method get valid recipient list noel jones thu 07 aug 2008 221518 0600 recipient verification