Hello Ted, Thank you for your response . But my problem about sendmail is, I can't send mail by used cpmail01( cpmail01 is my smtp server) because sendmail try to use localhost as smtp server. I don't know why sendmail try to use localhost as smtp server , I config "<tt>define(`SMART_HOST',`cpmail01')</tt> " in sendmail.mc already. Winai. Date: Thu, 17 Feb 2005 17:31:56 +0700 From: winai.p@cpf.co.th Subject: [rhn-users] sendmail problem, can't send to external email account To: rhn-users@redhat.com Message-ID: <OFB82FBDD2.3C94DEAC-ON47256FAB.0039256E-47256FAB.0039DB02@cpf.co.th> Content-Type: text/plain; charset="us-ascii" 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. Date: Thu, 17 Feb 2005 03:01:44 -0800 From: Ted Pennings <ted@hostleft.com> Subject: Re: [rhn-users] sendmail problem, can't send to external email account To: Red Hat Network Users List <rhn-users@redhat.com> Message-ID: <8e1242d934924c7e6bc318246cc9d9b0@hostleft.com> Content-Type: text/plain; charset=US-ASCII; format=flowed I would try specifying a FQDN for the box or specifying a sender name in the command, for the From header. This could be the breakpoint for sendmail. Try this: [oracle] $cat logbackup.log | /usr/sbin/sendmail -f you@example.com -v winai.p@cpf.co.th -Ted