text_combined: victor duchovni dxdewmdieulnutmorganstanleycom mon feb 11 2008 085422pm 0200 barak yakir wrote thanks reply please let rephrase problem talked isp policy follow 1 12 tcp connection per minute result 5 minutes ban 2 250 recipients per message result discarding entire message given time might 12 different domains deliver hosted behind isp mx host constructing transport table hosted domain nightmare talking hundreds domains limit number connections mx host well number recipients per message avoid breaking policy isp serving hundreds domains limits 12 connections minute poor job hosting domains postfix currently solution short fact trying keep track domains dont need 100 accurate mostly right close enough 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 211138 0500 smtp_connection_cache_destinations network address