Dear all, Please help me, I have problem about sendmail. I can't send to external email account when i used command following [oracle] $cat logbackup.log | /usr/sbin/sendmail -v winai.p@cpf.co.th result is : WARNING: local host name (dbora-swt01) is not qualified; fix $j in config file winai.p@cpf.co.th... Deferred: Name server: cpmail01: host name lookup failure I'm using cpmail01 as smtp server. I'm already add "cpmail01" to my hosts file and i don't set DNS server I can ping cpmail01 and I can sendmail to this account by telnet with port 25 to cpmail01 . I don't sure to config sendmail.mc. Thanks in advance. Winai.