vvrpgsporcupineorg barak yakir hi im trying set postfx 2322 cache destination network address one major isps primary mx record host hundreds domains im using smtp_connection_cache_destinations foocom working forcing set list new domain every time im getting error mail server solution set ip address smtp_connection_cache_destination 1234 problem working appeared scache lookups cant deal network addresses instead experimenting read documentation smtp_connection_cache_destinations default empty permanently enable smtp connection caching specified destina tions smtp connection caching connection closed imme diately completion mail transaction instead connec tion kept open smtp_connection_cache_time_limit seconds allows connections reused deliveries improve mail delivery performance specify comma white space separated list destinations pseudodestinations mail sent without relay host domain name right hand side email address without around numeric ip address mail sent via relay host relay host name without nondefault tcp port specified maincf transport map mail sent via unixdomain socket pathname without unix prefix filename domain names andor relay host names defined typetable domain names andor relay hosts name lefthand side righthand side result typetable lookups ignored according postfix 22 release note im quoting feature 20040723 perdestination smtp connection caching enabled smtp_connection_cache_destinations parameter parameter requires bare domain names ip addresses without tcp port avoid syntax conflict hostport maptypemapname entries bug release patch work around accomplish desire behavior history file final documentation feature wietse tue 05 aug 2008 204104 0500 smtp_connection_cache_destinations network address