아래 글 올린 사람인데요....
센트메일랑 qpopper 사용하구요 이런게 나오네요..
  [root@iloveyou mail]# mail -v papa at iloveyou.com Subject: 55
dd
.
Cc: 55
papa at iloveyou.com,88... Deferred: Connection timed out with localhost.com.
papa at iloveyou.com,55... Connecting to localhost.com. via relay...
papa at iloveyou.com,55... Deferred: Connection timed out with localhost.com.
 [root@butiloveyou mail]# nslookup mail.iloveyou.com
Note:  nslookup is deprecated and may be removed from future releases.
Consider using the `dig' or `host' programs instead.  Run nslookup with
the `-sil[ent]' option to prevent this message from appearing.
Server:        203.241.0.0
Address:       203.241.0.0#53
 Name:  mail.iloveyou.com
Address:203.241.0.0
 [root@butiloveyou mail]# nslookup ns.iloveyou.com
Note:  nslookup is deprecated and may be removed from future releases.
Consider using the `dig' or `host' programs instead.  Run nslookup with
the `-sil[ent]' option to prevent this message from appearing.
Server:        203.241.0.0
Address:       203.241.0.0#53
 Name:  ns.iloveyou.com
Address:203.241.0.0
 [root@butiloveyou mail]#