victor duchovni dxdewmdieulnutmorganstanleycom wed feb 13 2008 124517pm 0700 bqkxbroundspherecom wrote done lot research going docs searching archives cant get arms around one work company sends legitimate special offers products people signed receive spam anyway recently comcast implemented new policy receive messages stay 6 recipients per second defer go another case damage wellmeaning administrators actual spammers shame following set settings postfix version 225 solaris 9 mastercf comcast unix n 1 smtp smtp_connect_timeout5 smtp_helo_timeout5 postfix 25 includes suppor mandatory minimum message spacing destination upgrade 250 rebuilding transport file restarting postfix still see logs hitting servers missing rate limit latency low enough even concurrency limit 1 slow enough need upgrade 25 higher get functionality need yes 25 adds support perdestination rate limits really intended users soho isp msas fact major isp inbound mx host rather sad users really want content move mailboxes elsewhere bulk senders likely split load multiple sending ips compensate lame course content less popular users luck 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 235113 0500 comcasts 6 recipient per second limit