noel jones ubdarhmeganvbhcsorg bill purvis wrote hi ive installed postfix ubuntu 710 machine ive needed mta use kmail client handles sending mails downloading remote pop3 mailbox need able send emails program struggled use sendmail years ago decided give postfix try certain amount hassles working however ip address seems upset isps used problems result advised route outgoing emails via isp hotchillinet worked fine need tell postfix maybe dont understand jargon ive able find anything tells want outgoing emails sent initially isp mail server forward destination anyone give simple recipe many thanks advance bill heres stuff read first httpwwwpostfixorgbasic_configuration_readmehtml httpwwwpostfixorgsoho_readmehtml basic configuration information httpwwwpostfixorgstandard_configuration_readmehtmlnull_client key parameter probably looking relayhost set isps mail server httpwwwpostfixorgpostconf5htmlrelayhost maincf relayhost smtpexamplecom note brackets suppress mx lookups likely required situation noel jones tue 05 aug 2008 201936 0600 configuration query