domain name of the sender (sendmail)

[offers]

the domain name of our company is advantageic.com
i have noticed that all the emails from our company show our domain name as
advantageic.advantageic.com
Any help!!!!!

[cheesecake42]

type hostname by itself from a terminal on the mail server and tell us what the output is. also, post the contents of your hostfiles (/etc/hostname and /etc/hosts)

[offers]

[root@advantageic test]# host advantageic.com
advantageic.com has address 74.208.136.214
advantageic.com mail is handled by 10 mx01.1and1.com.
advantageic.com mail is handled by 10 mx00.1and1.com.


[root@advantageic test]# cat /etc/hosts
127.0.0.1 localhost
127.0.0.1 advantageic.com advantageic
192.168.1.3 advantageic.com advantageic
[root@advantageic test]#


there is no file /etc/hostname (i found one in /bin/hostname but it is unreadable)

[cheesecake42]

what distro are you using?

[offers]

[root@advantageic ~]# cat /proc/version
Linux version 2.6.18-1.2798.fc6 (brewbuilder@hs20-bc2-4.build.redhat.com) (gcc version 4.1.1 20061011 (Red Hat 4.1.1-30)) #1 SMP Mon Oct 16 14:37:32 EDT 2006

[cheesecake42]

the /bin/hostname file is actually the program "hostname". Run hostname by itself with no options and post the output.

[offers]

[root@advantageic mmsc]# hostname
advantageic

[cheesecake42]

Hmm have you searched through your /etc/mail/sendmail.cf file for any instances of advantageic.advantageic.com ?