barak yakir haimbtehilagovil 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 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 thanks advance barak yakir wed 06 aug 2008 033651 0200 smtp_connection_cache_destinations network address