victor duchovni dxdewmdieulnutmorganstanleycom mon feb 11 2008 020543pm 0500 wietse venema wrote barak yakir thanks reply please let rephrase problem talked isp policy follow 1 12 tcp connection per minute result 5 minutes ban etcpostfixmaincf requires postfix 25 later smtp_destination_rate_delay 10s wont help much single mx host hosts hundreds domains viktor disclaimer offlist followups get onlist replies get ignored please ignore replyto header unsubscribe postfixusers list visit httpwwwpostfixorglistshtml click link response solves problem best way thank send worked thanks followup must respond please put worked thanks subject delete quickly tue 05 aug 2008 211213 0500 smtp_connection_cache_destinations network address