sendmail不能发信出去。

legumer

# mail
Mail version 8.1 6/6/93.  Type ? for help.
"/var/spool/mail/root" 1 messages 1 new
>N  1 MAILER-DAEMON@localh  Wed Dec 3 08:55  60/1914  "Returned mail: see tr"
&     # simply press <ENTER> key to see each message
Message 1:
From MAILER-DAEMON@localhost.localdomain  Wed Dec  3 08:55:39 2002
Date: Wed, 3 Dec 2003 08:55:39 -0500
From: Mail Delivery Subsystem <MAILER-DAEMON@localhost.localdomain>
To: root@localhost.localdomain
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
        boundary="DAA03153.938948139/localhost.localdomain"
Subject: Returned mail: see transcript for details
Auto-Submitted: auto-generated (failure)
This is a MIME-encapsulated message
--DAA03153.938948139/localhost.localdomain
The original message was received at Wed, 3 Dec 2003 08:55:39 -0500
from Enterprise3
--- The following addresses had transient non-fatal errors ---
<michael@mommabears.cob>
     (reason: 550 Host unknown)
   --- Transcript of session follows ---
550 5.1.2 <michael@mommabears.cob>... Host unknown
(Name server: mommabears.cob: host not found)
..
(additional details deleted)
..

& d     # delete current read buffer
& q     # quit mail
#

aries1998

--- The following addresses had transient non-fatal errors ---
<michael@mommabears.cob>
(reason: 550 Host unknown)
--- Transcript of session follows ---
550 5.1.2 <michael@mommabears.cob>... Host unknown
(Name server: mommabears.cob: host not found)

找不到ip，看看dns的设置

legumer

好的，我看看。多谢~