i have private email server, used squirrelmail access it, use thunderbird. thunderbird want access port 587 if use startls. version of sendmail provided on lubuntu 12.04, provides access port 587 using localhost. want access domain-name 587, can use laptop when working customer site. looks should remove no_default_msa, , type make , reload configs. doing this, generates message 'opendaemonsocket: deamon msa: can not bind: address in use, sendmail dies message smtp socket wedged: exit known how configure sendmail accept non localhost connections on port 587? have looked on wider net, of answers either not work or several years out of date! the follwoing row sendmail.mc: daemon_options(`family=inet, name=msp-v4, port=submission, m=ea, addr=127.0.0.1')dnl should become daemon_options(`family=inet, name=msp-v4, port=submission, m=ea')dnl luck! ...